diff --git a/.eslintrc b/.eslintrc
index 32b18a22..b69adc3a 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -82,6 +82,7 @@
     "import/no-unresolved": "off",
     "import/prefer-default-export": "off",
     "indent": "off",
+    "no-plusplus": "off",
     "no-underscore-dangle": "off",
     "no-unused-vars": "off",
     "react/jsx-one-expression-per-line": "off",
diff --git a/src/config/lexics/public.tsx b/src/config/lexics/public.tsx
index d92ee766..71cabadf 100644
--- a/src/config/lexics/public.tsx
+++ b/src/config/lexics/public.tsx
@@ -1,4 +1,10 @@
 export const publicLexics = {
+  error_empty_email: 2498,
+  error_fill_out_required_fields: 12911,
+  error_fill_out_this_field: 12933,
+  error_invalid_email_format: 12908,
+  error_select_country_first: 12910,
+  error_simple_password: 12940,
   form_address1: 12914,
   form_address2: 12915,
   form_card_code: 12918,
@@ -15,7 +21,6 @@ export const publicLexics = {
   form_region: 12932,
   login: 1367,
   next: 12916,
-  please_fill_out_this_field: 12933,
   register: 1305,
   select_language: 1005,
   step_title_card: 12917,
diff --git a/src/features/Combobox/index.tsx b/src/features/Combobox/index.tsx
index 515eebe1..cf5892a1 100644
--- a/src/features/Combobox/index.tsx
+++ b/src/features/Combobox/index.tsx
@@ -5,7 +5,11 @@ import map from 'lodash/map'
 import '@reach/combobox/styles.css'
 
 import { T9n } from 'features/T9n'
-import { Label } from 'features/Common/Input/styled'
+import {
+  Label,
+  Column,
+  Error,
+} from 'features/Common/Input/styled'
 
 import { Props, Option } from './types'
 import { useCombobox } from './hooks'
@@ -21,6 +25,7 @@ import {
 export const Combobox = <T extends Option>(props: Props<T>) => {
   const {
     disabled,
+    error,
     id,
     label,
     labelLexic,
@@ -42,41 +47,48 @@ export const Combobox = <T extends Option>(props: Props<T>) => {
   } = useCombobox(props)
 
   return (
-    <ComboboxStyled openOnFocus={openOnFocus} onSelect={onOptionSelect}>
-      <Label
-        labelWidth={labelWidth}
-        htmlFor={id}
+    <Column>
+      <ComboboxStyled
+        error={error}
+        openOnFocus={openOnFocus}
+        onSelect={onOptionSelect}
       >
-        {
-          labelLexic
-            ? <T9n t={labelLexic} />
-            : label
-        }
-        {withArrow && <Arrow />}
-      </Label>
-      <ComboboxInputStyled
-        id={id}
-        required={required}
-        disabled={disabled}
-        value={query}
-        title={title}
-        pattern={pattern}
-        onChange={onQueryChange}
-        onBlur={onInputBlur}
-        onKeyDown={onKeyDown}
-      />
-      {!isEmpty(options) && (
-        <ComboboxPopoverStyled>
-          <ComboboxListStyled ref={popoverRef}>
-            {map(options, ({ id: optionId, name }) => (
-              <ComboboxOptionStyled
-                key={optionId}
-                value={name}
-              />
-            ))}
-          </ComboboxListStyled>
-        </ComboboxPopoverStyled>
-      )}
-    </ComboboxStyled>
+        <Label
+          labelWidth={labelWidth}
+          htmlFor={id}
+        >
+          {
+            labelLexic
+              ? <T9n t={labelLexic} />
+              : label
+          }
+          {withArrow && <Arrow />}
+        </Label>
+        <ComboboxInputStyled
+          id={id}
+          required={required}
+          disabled={disabled}
+          value={query}
+          title={title}
+          pattern={pattern}
+          onChange={onQueryChange}
+          onBlur={onInputBlur}
+          onKeyDown={onKeyDown}
+        />
+        {!isEmpty(options) && (
+          <ComboboxPopoverStyled>
+            <ComboboxListStyled ref={popoverRef}>
+              {map(options, ({ id: optionId, name }) => (
+                <ComboboxOptionStyled
+                  key={optionId}
+                  value={name}
+                />
+              ))}
+            </ComboboxListStyled>
+          </ComboboxPopoverStyled>
+        )}
+      </ComboboxStyled>
+      <Error>{error && <T9n t={error} />}</Error>
+    </Column>
   )
 }
diff --git a/src/features/Combobox/types.tsx b/src/features/Combobox/types.tsx
index 52c46e71..9da8f896 100644
--- a/src/features/Combobox/types.tsx
+++ b/src/features/Combobox/types.tsx
@@ -13,6 +13,7 @@ export type Props<T> = Pick<InputHTMLAttributes<HTMLInputElement>, (
   | 'pattern'
   | 'title'
 )> & {
+  error?: string | null,
   label?: string,
   labelLexic?: string,
   labelWidth?: number,
diff --git a/src/features/Common/Input/index.tsx b/src/features/Common/Input/index.tsx
index cd27b715..793d2bed 100644
--- a/src/features/Common/Input/index.tsx
+++ b/src/features/Common/Input/index.tsx
@@ -1,15 +1,18 @@
-import React, { ChangeEvent } from 'react'
+import type { ChangeEvent, FocusEvent } from 'react'
+import React from 'react'
 
 import { T9n } from 'features/T9n'
 
 import {
-  TInputWrapper,
+  WrapperProps,
   InputWrapper,
   InputStyled,
   Label,
+  Error,
+  Column,
 } from './styled'
 
-type TInput = {
+type Props = {
   defaultValue?: string,
   id: string,
   inputWidth?: number,
@@ -17,22 +20,25 @@ type TInput = {
   labelLexic?: string,
   labelWidth?: number,
   maxLength?: number,
+  onBlur?: (event: FocusEvent<HTMLInputElement>) => void,
   onChange?: (event: ChangeEvent<HTMLInputElement>) => void,
   pattern?: string,
   required?: boolean,
   title?: string,
   type?: string,
   value?: string,
-} & TInputWrapper
+} & WrapperProps
 
 export const Input = ({
   defaultValue,
+  error,
   id,
   inputWidth,
   label,
   labelLexic,
   labelWidth,
   maxLength,
+  onBlur,
   onChange,
   paddingX,
   pattern,
@@ -41,32 +47,37 @@ export const Input = ({
   type,
   value,
   wrapperWidth,
-}: TInput) => (
-  <InputWrapper
-    wrapperWidth={wrapperWidth}
-    paddingX={paddingX}
-  >
-    <Label
-      htmlFor={id}
-      labelWidth={labelWidth}
+}: Props) => (
+  <Column>
+    <InputWrapper
+      wrapperWidth={wrapperWidth}
+      paddingX={paddingX}
+      error={error}
     >
-      {
-        labelLexic
-          ? <T9n t={labelLexic} />
-          : label
-      }
-    </Label>
-    <InputStyled
-      id={id}
-      type={type}
-      required={required}
-      value={value}
-      defaultValue={defaultValue}
-      onChange={onChange}
-      maxLength={maxLength}
-      inputWidth={inputWidth}
-      pattern={pattern}
-      title={title}
-    />
-  </InputWrapper>
+      <Label
+        htmlFor={id}
+        labelWidth={labelWidth}
+      >
+        {
+          labelLexic
+            ? <T9n t={labelLexic} />
+            : label
+        }
+      </Label>
+      <InputStyled
+        id={id}
+        type={type}
+        required={required}
+        value={value}
+        defaultValue={defaultValue}
+        onChange={onChange}
+        onBlur={onBlur}
+        maxLength={maxLength}
+        inputWidth={inputWidth}
+        pattern={pattern}
+        title={title}
+      />
+    </InputWrapper>
+    <Error>{error && <T9n t={error} />}</Error>
+  </Column>
 )
diff --git a/src/features/Common/Input/stories.tsx b/src/features/Common/Input/stories.tsx
index 51bb517e..75144628 100644
--- a/src/features/Common/Input/stories.tsx
+++ b/src/features/Common/Input/stories.tsx
@@ -33,3 +33,12 @@ export const EmailPassword = () => (
     />
   </Fragment>
 )
+
+export const WithError = () => (
+  <Input
+    id='email'
+    type='email'
+    label='Email'
+    error='Error message'
+  />
+)
diff --git a/src/features/Common/Input/styled.tsx b/src/features/Common/Input/styled.tsx
index 873080ba..cdbd4b36 100644
--- a/src/features/Common/Input/styled.tsx
+++ b/src/features/Common/Input/styled.tsx
@@ -1,14 +1,17 @@
 import styled, { css } from 'styled-components/macro'
 
-export type TInputWrapper = {
+import isNil from 'lodash/isNil'
+
+export type WrapperProps = {
+  error?: string | null,
   paddingX?: number,
   wrapperWidth?: number,
 }
 
-export const wrapperStyles = css<TInputWrapper>`
+export const wrapperStyles = css<WrapperProps>`
   width: ${({ wrapperWidth }) => (wrapperWidth ? `${wrapperWidth}px` : '100%')};
   height: 48px;
-  margin: 20px 0;
+  margin-top: 20px;
   padding-left: ${({ paddingX = 24 }) => (paddingX ? `${paddingX}px` : '')};
   padding-right: ${({ paddingX = 24 }) => (paddingX ? `${paddingX}px` : '')};
   padding-top: 13px;
@@ -18,17 +21,19 @@ export const wrapperStyles = css<TInputWrapper>`
   background-color: #3F3F3F;
   box-shadow: 0px 1px 1px rgba(0, 0, 0, 0.3);
   border-radius: 2px;
+  border: 1px solid ${(({ error }) => (isNil(error) ? 'transparent' : '#E64646'))};
+  border-width: 1px;
 `
 
-export const InputWrapper = styled.div<TInputWrapper>`
+export const InputWrapper = styled.div<WrapperProps>`
   ${wrapperStyles}
 `
 
-type TLabel = {
+type LabelProps = {
   labelWidth?: number,
 }
 
-export const Label = styled.label<TLabel>`
+export const Label = styled.label<LabelProps>`
   font-style: normal;
   font-weight: normal;
   font-size: 16px;
@@ -39,11 +44,11 @@ export const Label = styled.label<TLabel>`
   width: ${({ labelWidth }) => (labelWidth ? `${labelWidth}px` : '')};
 `
 
-type TInputStyled = {
+type InputProps = {
   inputWidth?: number,
 }
 
-export const inputStyles = css<TInputStyled>`
+export const inputStyles = css<InputProps>`
   flex-grow: 1;
   font-weight: bold;
   font-size: 20px;
@@ -73,6 +78,23 @@ export const inputStyles = css<TInputStyled>`
   }
 `
 
-export const InputStyled = styled.input<TInputStyled>`
+export const InputStyled = styled.input<InputProps>`
   ${inputStyles}
 `
+
+export const Column = styled.div`
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+`
+
+export const Error = styled.span`
+  min-height: 16px;
+  margin-top: 5px;
+  font-style: normal;
+  font-weight: normal;
+  font-size: 13px;
+  line-height: 16px;
+  letter-spacing: -0.078px;
+  color: #E64646;
+`
diff --git a/src/features/FormStore/hooks/useFormState.tsx b/src/features/FormStore/hooks/useFormState.tsx
new file mode 100644
index 00000000..ff74535a
--- /dev/null
+++ b/src/features/FormStore/hooks/useFormState.tsx
@@ -0,0 +1,64 @@
+import type { ChangeEvent } from 'react'
+import { useState, useCallback } from 'react'
+
+import isString from 'lodash/isString'
+
+type FieldState = {
+  error: string | null,
+  value: string,
+}
+
+type FormState = {[formId: string]: FieldState}
+
+export const useFormState = () => {
+  const [formState, setFormState] = useState<FormState>({})
+  const readFormValue = useCallback(
+    (fieldName: string) => formState[fieldName]?.value ?? '',
+    [formState],
+  )
+  const readFormError = useCallback(
+    (fieldName: string) => formState[fieldName]?.error ?? null,
+    [formState],
+  )
+
+  const updateFormValue = useCallback(
+    (fieldName: string) => (
+      (event: ChangeEvent<HTMLInputElement> | string) => {
+        const value = isString(event) ? event : event.target.value
+        setFormState(((state) => {
+          const newState = {
+            ...state,
+            [fieldName]: {
+              error: null,
+              value,
+            },
+          }
+          return newState
+        }))
+      }
+    ),
+    [],
+  )
+
+  const updateFormError = useCallback(
+    (fieldName: string, error: string) => {
+      setFormState(((state) => {
+        const newState = {
+          ...state,
+          [fieldName]: {
+            error,
+            value: state[fieldName]?.value,
+          },
+        }
+        return newState
+      }))
+    },
+    [],
+  )
+  return {
+    readFormError,
+    readFormValue,
+    updateFormError,
+    updateFormValue,
+  }
+}
diff --git a/src/features/FormStore/hooks/useFormValidators.tsx b/src/features/FormStore/hooks/useFormValidators.tsx
new file mode 100644
index 00000000..9ca1db88
--- /dev/null
+++ b/src/features/FormStore/hooks/useFormValidators.tsx
@@ -0,0 +1,23 @@
+import trim from 'lodash/trim'
+import every from 'lodash/every'
+import isEmpty from 'lodash/isEmpty'
+
+import { useFormState } from './useFormState'
+
+type Args = ReturnType<typeof useFormState>
+
+export const useFormValidators = ({
+  readFormValue,
+  updateFormError,
+}: Args) => {
+  const isFieldEmpty = (fieldName: string) => isEmpty(trim(readFormValue(fieldName)))
+
+  const allFieldsEmpty = (fieldNames: Array<string>) => (
+    every(fieldNames, isFieldEmpty)
+  )
+
+  return {
+    allFieldsEmpty,
+    isFieldEmpty,
+  }
+}
diff --git a/src/features/FormStore/index.tsx b/src/features/FormStore/index.tsx
new file mode 100644
index 00000000..bf40ee21
--- /dev/null
+++ b/src/features/FormStore/index.tsx
@@ -0,0 +1,42 @@
+import type { ReactNode } from 'react'
+import React, {
+  createContext,
+  useContext,
+  useMemo,
+} from 'react'
+
+import { useFormState } from './hooks/useFormState'
+import { useFormValidators } from './hooks/useFormValidators'
+
+type FormStore = (
+  ReturnType<typeof useFormState>
+  & ReturnType<typeof useFormValidators>
+)
+type Props = {
+  children: ReactNode,
+}
+
+const FormContext = createContext({} as FormStore)
+
+/**
+ * стор формы, содержит состояние формы[значение полей, ошибки]
+ * дает доступ к функциям чтения и обновления состояния
+ * также часто используемым функциям для валидации полей
+ */
+export const FormStore = ({
+  children,
+}: Props) => {
+  const formState = useFormState()
+  const validators = useFormValidators(formState)
+  const value = useMemo(
+    () => ({ ...formState, ...validators }),
+    [formState, validators],
+  )
+  return (
+    <FormContext.Provider value={value}>
+      {children}
+    </FormContext.Provider>
+  )
+}
+
+export const useForm = () => useContext(FormContext)
diff --git a/src/features/Login/styled.tsx b/src/features/Login/styled.tsx
index bc2837a3..64e312d9 100644
--- a/src/features/Login/styled.tsx
+++ b/src/features/Login/styled.tsx
@@ -33,6 +33,7 @@ export const BlockTitle = styled.span`
 export const ButtonsBlock = styled.div<{forSubsPage?: boolean}>`
   display: flex;
   flex-direction: column;
+  align-items: center;
   margin-top: ${({ forSubsPage }) => (forSubsPage ? '80px' : '60px')};
   margin-bottom: ${({ forSubsPage }) => (forSubsPage ? '96px' : '')};
   position: relative;
diff --git a/src/features/Register/components/RegistrationStep/config.tsx b/src/features/Register/components/RegistrationStep/config.tsx
index 4dc1de27..15b683c1 100644
--- a/src/features/Register/components/RegistrationStep/config.tsx
+++ b/src/features/Register/components/RegistrationStep/config.tsx
@@ -5,9 +5,34 @@ export const formIds = {
   country: 'country',
   email: 'email',
   firstname: 'firstname',
+  formError: 'formError',
   lastname: 'lastname',
   password: 'password',
   phone: 'phone',
   postalCode: 'postalCode',
   region: 'region',
 }
+
+export const requiredFields = [
+  formIds.address1,
+  formIds.city,
+  formIds.country,
+  formIds.email,
+  formIds.firstname,
+  formIds.lastname,
+  formIds.password,
+  formIds.phone,
+  formIds.postalCode,
+  formIds.region,
+]
+
+export const simpleValidationFields = [
+  formIds.address1,
+  formIds.city,
+  formIds.country,
+  formIds.firstname,
+  formIds.lastname,
+  formIds.phone,
+  formIds.postalCode,
+  formIds.region,
+]
diff --git a/src/features/Register/components/RegistrationStep/hooks/useCities.tsx b/src/features/Register/components/RegistrationStep/hooks/useCities.tsx
index 1bd29576..89e1ddd5 100644
--- a/src/features/Register/components/RegistrationStep/hooks/useCities.tsx
+++ b/src/features/Register/components/RegistrationStep/hooks/useCities.tsx
@@ -1,15 +1,15 @@
-import type { ChangeEvent } from 'react'
 import {
   useState,
   useCallback,
-  useEffect,
 } from 'react'
 
 import debounce from 'lodash/debounce'
-import trim from 'lodash/trim'
 
 import type { Cities, City } from 'requests'
 import { getCountryCities } from 'requests'
+import { useForm } from 'features/FormStore'
+
+import { formIds } from '../config'
 
 const useCitiesList = () => {
   const [cities, setCities] = useState<Cities>([])
@@ -23,7 +23,7 @@ const useCitiesList = () => {
     [],
   )
 
-  const resetCities = useCallback(() => setCities([]), [])
+  const resetCities = () => setCities([])
 
   return {
     cities,
@@ -32,31 +32,18 @@ const useCitiesList = () => {
   }
 }
 
-export const useCities = (selectedCountryId?: number) => {
-  const [cityQuery, setCityQuery] = useState('')
+export const useCities = () => {
+  const { updateFormValue } = useForm()
   const [selectedCity, setSelectedCity] = useState<City | null>(null)
 
+  const setCityQuery = useCallback(updateFormValue(formIds.city), [])
+
   const {
     cities,
     getCities,
     resetCities,
   } = useCitiesList()
 
-  const trimmedCity = trim(cityQuery)
-  useEffect(() => {
-    if (trimmedCity && selectedCountryId) {
-      getCities(trimmedCity, selectedCountryId)
-    }
-  }, [
-    trimmedCity,
-    selectedCountryId,
-    getCities,
-  ])
-
-  const onCityQueryChange = ({ target }: ChangeEvent<HTMLInputElement>) => {
-    setCityQuery(target.value)
-  }
-
   const onCitySelect = (newCity: City | null) => {
     if (newCity) {
       setCityQuery(newCity.name)
@@ -66,18 +53,14 @@ export const useCities = (selectedCountryId?: number) => {
     }
   }
 
-  const resetSelectedCity = useCallback(
-    () => {
-      setCityQuery('')
-      setSelectedCity(null)
-    },
-    [setCityQuery, setSelectedCity],
-  )
+  const resetSelectedCity = () => {
+    setCityQuery('')
+    setSelectedCity(null)
+  }
 
   return {
     cities,
-    cityQuery,
-    onCityQueryChange,
+    getCities,
     onCitySelect,
     resetCities,
     resetSelectedCity,
diff --git a/src/features/Register/components/RegistrationStep/hooks/useCountries.tsx b/src/features/Register/components/RegistrationStep/hooks/useCountries.tsx
index 4e919131..856372d6 100644
--- a/src/features/Register/components/RegistrationStep/hooks/useCountries.tsx
+++ b/src/features/Register/components/RegistrationStep/hooks/useCountries.tsx
@@ -11,7 +11,7 @@ import type { Countries } from 'requests'
 import { getCountries } from 'requests'
 import { useLexicsStore } from 'features/LexicsStore'
 
-type Country = {
+export type Country = {
   id: number,
   name: string,
 }
@@ -48,7 +48,7 @@ export const useCountries = () => {
 
   return {
     countries: transformedCountries,
-    onCountrySelect: setSelectedCountry,
     selectedCountry,
+    setSelectedCountry,
   }
 }
diff --git a/src/features/Register/components/RegistrationStep/hooks/useForm.tsx b/src/features/Register/components/RegistrationStep/hooks/useForm.tsx
index 2363ff3a..62e865db 100644
--- a/src/features/Register/components/RegistrationStep/hooks/useForm.tsx
+++ b/src/features/Register/components/RegistrationStep/hooks/useForm.tsx
@@ -1,91 +1,88 @@
-import type { FormEvent } from 'react'
+import type { ChangeEvent, FocusEvent } from 'react'
 import { useEffect } from 'react'
 
 import trim from 'lodash/trim'
 
-import { useAuthStore } from 'features/AuthStore'
+import { useForm } from 'features/FormStore'
 import { isValidEmail } from 'features/Register/helpers/isValidEmail'
 
 import { formIds } from '../config'
+import type { Country } from './useCountries'
 import { useCountries } from './useCountries'
 import { useCities } from './useCities'
+import { useSubmitHandler } from './useSubmitHandler'
 
-const readFormValue = (event: FormEvent<HTMLFormElement>) => (
-  (fieldName: string) => trim(event.currentTarget[fieldName]?.value)
-)
-
-export const useForm = () => {
-  const { register } = useAuthStore()
+export const useRegistrationForm = () => {
+  const {
+    readFormError,
+    readFormValue,
+    updateFormError,
+    updateFormValue,
+  } = useForm()
   const {
     countries,
-    onCountrySelect,
     selectedCountry,
+    setSelectedCountry,
   } = useCountries()
-
   const {
     cities,
-    cityQuery,
-    onCityQueryChange,
+    getCities,
     onCitySelect,
     resetCities,
     resetSelectedCity,
     selectedCity,
-  } = useCities(selectedCountry?.id)
+  } = useCities()
 
-  useEffect(() => {
-    resetSelectedCity()
-    resetCities()
-  }, [
+  const handleSubmit = useSubmitHandler({
+    selectedCity,
     selectedCountry,
-    resetSelectedCity,
-    resetCities,
-  ])
+  })
 
-  const getCityParams = () => {
-    if (selectedCity) return { cityId: selectedCity.id }
-    return { city: cityQuery }
+  const onEmailBlur = ({ target }: FocusEvent<HTMLInputElement>) => {
+    const email = trim(target.value)
+    if (email && !isValidEmail(email)) {
+      updateFormError(formIds.email, 'error_invalid_email_format')
+    }
   }
 
-  const handleSubmit = async (event: FormEvent<HTMLFormElement>) => {
-    event.preventDefault()
-    if (!selectedCountry) return
+  const onCountrySelect = (country: Country | null) => {
+    setSelectedCountry(country)
+    updateFormValue(formIds.country)(country?.name || '')
+    resetCities()
+    resetSelectedCity()
+  }
 
-    const readFieldValue = readFormValue(event)
-    const firstname = readFieldValue(formIds.firstname)
-    const lastname = readFieldValue(formIds.lastname)
-    const phone = readFieldValue(formIds.phone)
-    const email = readFieldValue(formIds.email)
-    const password = readFieldValue(formIds.password)
-    const postalCode = Number(readFieldValue(formIds.postalCode))
-    const region = readFieldValue(formIds.region)
-    const address1 = readFieldValue(formIds.address1)
-    const address2 = readFieldValue(formIds.address2)
+  const onRegionOrCityChange = (fieldName: string) => (
+    ({ target }: ChangeEvent<HTMLInputElement>) => {
+      if (selectedCountry) {
+        updateFormValue(fieldName)(target.value)
+      } else {
+        updateFormError(formIds.country, 'error_select_country_first')
+      }
+    }
+  )
 
-    if (isValidEmail(email)) {
-      register({
-        address1,
-        address2,
-        ...getCityParams(),
-        countryId: selectedCountry.id,
-        email,
-        firstname,
-        lastname,
-        password,
-        phone,
-        postalCode,
-        region,
-      })
+  const trimmedCity = trim(readFormValue(formIds.city))
+  useEffect(() => {
+    if (trimmedCity && selectedCountry?.id) {
+      getCities(trimmedCity, selectedCountry.id)
     }
-  }
+  }, [
+    trimmedCity,
+    selectedCountry,
+    getCities,
+  ])
 
   return {
     cities,
-    cityQuery,
     countries,
     handleSubmit,
-    onCityQueryChange,
     onCitySelect,
     onCountrySelect,
-    selectedCountry,
+    onEmailBlur,
+    onRegionOrCityChange,
+    readFormError,
+    readFormValue,
+    updateFormValue,
   }
 }
diff --git a/src/features/Register/components/RegistrationStep/hooks/useSubmitHandler.tsx b/src/features/Register/components/RegistrationStep/hooks/useSubmitHandler.tsx
new file mode 100644
index 00000000..b4d12659
--- /dev/null
+++ b/src/features/Register/components/RegistrationStep/hooks/useSubmitHandler.tsx
@@ -0,0 +1,65 @@
+import type { FormEvent } from 'react'
+
+import trim from 'lodash/trim'
+
+import type { City } from 'requests'
+
+import { useAuthStore } from 'features/AuthStore'
+import { useForm } from 'features/FormStore'
+
+import { formIds } from '../config'
+import type { Country } from './useCountries'
+import { useValidateForm } from './useValidateForm'
+
+type Args = {
+  selectedCity: City | null,
+  selectedCountry: Country | null,
+}
+
+export const useSubmitHandler = ({
+  selectedCity,
+  selectedCountry,
+}: Args) => {
+  const { register } = useAuthStore()
+  const { readFormValue } = useForm()
+  const validateForm = useValidateForm()
+
+  const readTrimmedValue = (fieldName: string) => trim(readFormValue(fieldName))
+
+  const getCityParams = () => {
+    if (selectedCity) return { cityId: selectedCity.id }
+    return { city: readTrimmedValue(formIds.city) }
+  }
+
+  const handleSubmit = async (event: FormEvent<HTMLFormElement>) => {
+    event.preventDefault()
+
+    if (validateForm() && selectedCountry) {
+      const firstname = readTrimmedValue(formIds.firstname)
+      const lastname = readTrimmedValue(formIds.lastname)
+      const phone = readTrimmedValue(formIds.phone)
+      const email = readTrimmedValue(formIds.email)
+      const password = readTrimmedValue(formIds.password)
+      const postalCode = Number(readTrimmedValue(formIds.postalCode))
+      const region = readTrimmedValue(formIds.region)
+      const address1 = readTrimmedValue(formIds.address1)
+      const address2 = readTrimmedValue(formIds.address2)
+
+      register({
+        address1,
+        address2,
+        ...getCityParams(),
+        countryId: selectedCountry.id,
+        email,
+        firstname,
+        lastname,
+        password,
+        phone,
+        postalCode,
+        region,
+      })
+    }
+  }
+
+  return handleSubmit
+}
diff --git a/src/features/Register/components/RegistrationStep/hooks/useValidateForm.tsx b/src/features/Register/components/RegistrationStep/hooks/useValidateForm.tsx
new file mode 100644
index 00000000..26bd84b0
--- /dev/null
+++ b/src/features/Register/components/RegistrationStep/hooks/useValidateForm.tsx
@@ -0,0 +1,62 @@
+import trim from 'lodash/trim'
+import reduce from 'lodash/reduce'
+
+import { useForm } from 'features/FormStore'
+import { isValidEmail } from 'features/Register/helpers/isValidEmail'
+import { isValidPassword } from 'features/Register/helpers/isValidPassword'
+
+import {
+  formIds,
+  requiredFields,
+  simpleValidationFields,
+} from '../config'
+
+export const useValidateForm = () => {
+  const {
+    allFieldsEmpty,
+    isFieldEmpty,
+    readFormValue,
+    updateFormError,
+  } = useForm()
+
+  const readTrimmedValue = (fieldName: string) => trim(readFormValue(fieldName))
+
+  const setErrorOnEmptyFields = (fieldNames: Array<string>, message: string) => (
+    reduce(
+      fieldNames,
+      (acc, fieldName) => {
+        if (isFieldEmpty(fieldName)) {
+          updateFormError(fieldName, message)
+          return acc + 1
+        }
+        return acc
+      },
+      0,
+    )
+  )
+
+  const validateForm = () => {
+    let errorsCount = 0
+    const email = readTrimmedValue(formIds.email)
+    const password = readTrimmedValue(formIds.password)
+    if (allFieldsEmpty(requiredFields)) {
+      updateFormError(formIds.formError, 'error_fill_out_required_fields')
+      setErrorOnEmptyFields(requiredFields, '')
+      return false
+    }
+    if (isFieldEmpty(formIds.email)) {
+      updateFormError(formIds.email, 'error_empty_email')
+      errorsCount++
+    } else if (!isValidEmail(email)) {
+      updateFormError(formIds.email, 'error_invalid_email_format')
+    }
+    if (!isValidPassword(password)) {
+      updateFormError(formIds.password, 'error_simple_password')
+      errorsCount++
+    }
+    errorsCount += setErrorOnEmptyFields(simpleValidationFields, 'error_fill_out_this_field')
+    return errorsCount === 0
+  }
+
+  return validateForm
+}
diff --git a/src/features/Register/components/RegistrationStep/index.tsx b/src/features/Register/components/RegistrationStep/index.tsx
index 4d9e63d7..949caae2 100644
--- a/src/features/Register/components/RegistrationStep/index.tsx
+++ b/src/features/Register/components/RegistrationStep/index.tsx
@@ -3,34 +3,32 @@ import React from 'react'
 import { T9n } from 'features/T9n'
 import { Combobox } from 'features/Combobox'
 import { Input, ButtonSolid } from 'features/Common'
+import { Error } from 'features/Common/Input/styled'
 import {
   BlockTitle,
   ButtonsBlock,
   Form,
 } from 'features/Login/styled'
-import { useLexicsStore } from 'features/LexicsStore'
+import { FormStore } from 'features/FormStore'
 
 import { formIds } from './config'
-import { passwordRegex } from '../../helpers/isValidPassword'
-import { emailRegex } from '../../helpers/isValidEmail'
-import { useForm } from './hooks/useForm'
+import { useRegistrationForm } from './hooks/useForm'
 
-const commonFieldRegex = '^.{0,500}$'
 const labelWidth = 116
 
-export const RegistrationStep = () => {
+const Registration = () => {
   const {
     cities,
-    cityQuery,
     countries,
     handleSubmit,
-    onCityQueryChange,
     onCitySelect,
     onCountrySelect,
-    selectedCountry,
-  } = useForm()
-  const { translate } = useLexicsStore()
-  const defaultMessage = translate('please_fill_out_this_field')
+    onEmailBlur,
+    onRegionOrCityChange,
+    readFormError,
+    readFormValue,
+    updateFormValue,
+  } = useRegistrationForm()
 
   return (
     <Form onSubmit={handleSubmit}>
@@ -39,107 +37,116 @@ export const RegistrationStep = () => {
       </BlockTitle>
 
       <Input
-        required
         id={formIds.firstname}
+        value={readFormValue(formIds.firstname)}
+        error={readFormError(formIds.firstname)}
         labelLexic='form_firstname'
         labelWidth={labelWidth}
-        pattern={commonFieldRegex}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.firstname)}
       />
       <Input
-        required
         id={formIds.lastname}
+        value={readFormValue(formIds.lastname)}
+        error={readFormError(formIds.lastname)}
         labelLexic='form_lastname'
         labelWidth={labelWidth}
-        pattern={commonFieldRegex}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.lastname)}
       />
       <Input
-        required
         id={formIds.phone}
+        value={readFormValue(formIds.phone)}
+        error={readFormError(formIds.phone)}
         type='tel'
         labelLexic='form_phone'
         labelWidth={labelWidth}
-        pattern='^[0-9]{8,100}$'
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.phone)}
       />
       <Input
-        required
         id={formIds.email}
+        value={readFormValue(formIds.email)}
+        error={readFormError(formIds.email)}
         type='email'
         labelLexic='form_email'
         labelWidth={labelWidth}
-        pattern={emailRegex}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.email)}
+        onBlur={onEmailBlur}
       />
       <Input
-        required
         id={formIds.password}
+        value={readFormValue(formIds.password)}
+        error={readFormError(formIds.password)}
         type='password'
         labelLexic='form_password'
         labelWidth={labelWidth}
-        pattern={passwordRegex}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.password)}
       />
       <Combobox
-        required
         openOnFocus
         withArrow
         id={formIds.country}
+        value={readFormValue(formIds.country)}
+        error={readFormError(formIds.country)}
         labelLexic='form_country'
         labelWidth={labelWidth}
         options={countries}
+        onChange={updateFormValue(formIds.country)}
         onSelect={onCountrySelect}
-        title={defaultMessage}
       />
       <Combobox
-        required
         id={formIds.city}
+        value={readFormValue(formIds.city)}
+        error={readFormError(formIds.city)}
         labelLexic='form_city'
         labelWidth={labelWidth}
-        disabled={!selectedCountry}
-        value={cityQuery}
-        onChange={onCityQueryChange}
+        onChange={onRegionOrCityChange(formIds.city)}
         options={cities}
         onSelect={onCitySelect}
-        pattern={commonFieldRegex}
-        title={defaultMessage}
       />
       <Input
-        required
         id={formIds.postalCode}
+        value={readFormValue(formIds.postalCode)}
+        error={readFormError(formIds.postalCode)}
         labelLexic='form_postal_code'
         labelWidth={labelWidth}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.postalCode)}
       />
       <Input
-        required
         id={formIds.region}
+        value={readFormValue(formIds.region)}
+        error={readFormError(formIds.region)}
         labelLexic='form_region'
         labelWidth={labelWidth}
-        pattern={commonFieldRegex}
-        title={defaultMessage}
+        onChange={onRegionOrCityChange(formIds.region)}
       />
       <Input
-        required
         id={formIds.address1}
+        value={readFormValue(formIds.address1)}
+        error={readFormError(formIds.address1)}
         labelLexic='form_address1'
         labelWidth={labelWidth}
-        pattern={commonFieldRegex}
-        title={defaultMessage}
+        onChange={updateFormValue(formIds.address1)}
       />
       <Input
         id={formIds.address2}
+        value={readFormValue(formIds.address2)}
+        error={readFormError(formIds.address2)}
         labelLexic='form_address2'
         labelWidth={labelWidth}
-        pattern={commonFieldRegex}
+        onChange={updateFormValue(formIds.address2)}
       />
 
       <ButtonsBlock>
         <ButtonSolid type='submit'>
           <T9n t='next' />
         </ButtonSolid>
+        <Error><T9n t={readFormError(formIds.formError) || ''} /></Error>
       </ButtonsBlock>
     </Form>
   )
 }
+
+export const RegistrationStep = () => (
+  <FormStore>
+    <Registration />
+  </FormStore>
+)