diff --git a/rsconcept/frontend/src/context/UserProfileContext.tsx b/rsconcept/frontend/src/context/UserProfileContext.tsx
index fa7fcbc8..c467be5b 100644
--- a/rsconcept/frontend/src/context/UserProfileContext.tsx
+++ b/rsconcept/frontend/src/context/UserProfileContext.tsx
@@ -13,6 +13,7 @@ interface IUserProfileContext {
   loading: boolean;
   processing: boolean;
   error: ErrorData;
+  errorProcessing: ErrorData;
   setError: (error: ErrorData) => void;
   updateUser: (data: IUserUpdateData, callback?: DataCallback<IUserProfile>) => void;
 }
@@ -37,6 +38,7 @@ export const UserProfileState = ({ children }: UserProfileStateProps) => {
   const [loading, setLoading] = useState(false);
   const [processing, setProcessing] = useState(false);
   const [error, setError] = useState<ErrorData>(undefined);
+  const [errorProcessing, setErrorProcessing] = useState<ErrorData>(undefined);
 
   const reload = useCallback(() => {
     setError(undefined);
@@ -51,12 +53,12 @@ export const UserProfileState = ({ children }: UserProfileStateProps) => {
 
   const updateUser = useCallback(
     (data: IUserUpdateData, callback?: DataCallback<IUserProfile>) => {
-      setError(undefined);
+      setErrorProcessing(undefined);
       patchProfile({
         data: data,
         showError: true,
         setLoading: setProcessing,
-        onError: setError,
+        onError: setErrorProcessing,
         onSuccess: newData => {
           setUser(newData);
           const libraryUser = users.find(item => item.id === user?.id);
@@ -76,7 +78,7 @@ export const UserProfileState = ({ children }: UserProfileStateProps) => {
   }, [reload]);
 
   return (
-    <ProfileContext.Provider value={{ user, updateUser, error, loading, setError, processing }}>
+    <ProfileContext.Provider value={{ user, updateUser, error, loading, setError, processing, errorProcessing }}>
       {children}
     </ProfileContext.Provider>
   );
diff --git a/rsconcept/frontend/src/pages/RegisterPage.tsx b/rsconcept/frontend/src/pages/RegisterPage.tsx
index ef45b3bf..0b77b348 100644
--- a/rsconcept/frontend/src/pages/RegisterPage.tsx
+++ b/rsconcept/frontend/src/pages/RegisterPage.tsx
@@ -1,16 +1,18 @@
 'use client';
 
+import axios from 'axios';
 import clsx from 'clsx';
-import { useEffect, useState } from 'react';
+import { useEffect, useMemo, useState } from 'react';
 import { toast } from 'react-toastify';
 
 import { urls } from '@/app/urls';
 import { IconHelp } from '@/components/Icons';
-import InfoError from '@/components/info/InfoError';
+import InfoError, { ErrorData } from '@/components/info/InfoError';
 import Button from '@/components/ui/Button';
 import Checkbox from '@/components/ui/Checkbox';
 import FlexColumn from '@/components/ui/FlexColumn';
 import Overlay from '@/components/ui/Overlay';
+import PrettyJson from '@/components/ui/PrettyJSON';
 import SubmitButton from '@/components/ui/SubmitButton';
 import TextInput from '@/components/ui/TextInput';
 import TextURL from '@/components/ui/TextURL';
@@ -22,6 +24,24 @@ import { useConceptNavigation } from '@/context/NavigationContext';
 import { IUserSignupData } from '@/models/user';
 import { globals, patterns } from '@/utils/constants';
 
+function ProcessError({ error }: { error: ErrorData }): React.ReactElement {
+  if (axios.isAxiosError(error) && error.response && error.response.status === 400) {
+    if ('email' in error.response.data) {
+      return (
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+        <div className='w-full text-sm text-center select-text clr-text-red'>{error.response.data.email}.</div>
+      );
+    } else {
+      return (
+        <div className='text-sm select-text clr-text-red'>
+          <PrettyJson data={error.response} />
+        </div>
+      );
+    }
+  }
+  return <InfoError error={error} />;
+}
+
 function RegisterPage() {
   const router = useConceptNavigation();
   const { user, signup, loading, error, setError } = useAuth();
@@ -35,6 +55,8 @@ function RegisterPage() {
 
   const [acceptPrivacy, setAcceptPrivacy] = useState(false);
 
+  const isValid = useMemo(() => acceptPrivacy && !!email && !!username, [acceptPrivacy, email, username]);
+
   useEffect(() => {
     setError(undefined);
   }, [username, email, password, password2, setError]);
@@ -83,8 +105,7 @@ function RegisterPage() {
                 <IconHelp size='1.25rem' className='icon-primary' />
               </Overlay>
               <Tooltip anchorSelect={`#${globals.password_tooltip}`} offset={6}>
-                <p>- используйте уникальный пароль</p>
-                <p>- портал функционирует в тестовом режиме</p>
+                используйте уникальный пароль для каждого сайта
               </Tooltip>
             </div>
 
@@ -122,6 +143,15 @@ function RegisterPage() {
           </FlexColumn>
 
           <FlexColumn className='w-[15rem]'>
+            <div className='absolute'>
+              <Overlay id={globals.email_tooltip} position='top-[0rem] right-[-15rem]'>
+                <IconHelp size='1.25rem' className='icon-primary' />
+              </Overlay>
+              <Tooltip anchorSelect={`#${globals.email_tooltip}`} offset={6}>
+                электронная почта используется для восстановления пароля
+              </Tooltip>
+            </div>
+
             <TextInput
               id='email'
               autoComplete='email'
@@ -154,10 +184,10 @@ function RegisterPage() {
         </div>
 
         <div className='flex justify-around my-3'>
-          <SubmitButton text='Регистрировать' className='min-w-[10rem]' loading={loading} disabled={!acceptPrivacy} />
+          <SubmitButton text='Регистрировать' className='min-w-[10rem]' loading={loading} disabled={!isValid} />
           <Button text='Назад' className='min-w-[10rem]' onClick={() => handleCancel()} />
         </div>
-        {error ? <InfoError error={error} /> : null}
+        {error ? <ProcessError error={error} /> : null}
       </form>
     </AnimateFade>
   );
diff --git a/rsconcept/frontend/src/pages/UserProfilePage/EditorProfile.tsx b/rsconcept/frontend/src/pages/UserProfilePage/EditorProfile.tsx
index f5c88bc2..bc94bc93 100644
--- a/rsconcept/frontend/src/pages/UserProfilePage/EditorProfile.tsx
+++ b/rsconcept/frontend/src/pages/UserProfilePage/EditorProfile.tsx
@@ -1,17 +1,31 @@
 'use client';
 
+import axios from 'axios';
 import clsx from 'clsx';
 import { useLayoutEffect, useMemo, useState } from 'react';
 import { toast } from 'react-toastify';
 
+import InfoError, { ErrorData } from '@/components/info/InfoError';
 import SubmitButton from '@/components/ui/SubmitButton';
 import TextInput from '@/components/ui/TextInput';
 import { useBlockNavigation } from '@/context/NavigationContext';
 import { useUserProfile } from '@/context/UserProfileContext';
 import { IUserUpdateData } from '@/models/user';
 
+function ProcessError({ error }: { error: ErrorData }): React.ReactElement {
+  if (axios.isAxiosError(error) && error.response && error.response.status === 400) {
+    if ('email' in error.response.data) {
+      return (
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+        <div className='text-sm select-text clr-text-red'>{error.response.data.email}.</div>
+      );
+    }
+  }
+  return <InfoError error={error} />;
+}
+
 function EditorProfile() {
-  const { updateUser, user, processing } = useUserProfile();
+  const { updateUser, user, errorProcessing, processing } = useUserProfile();
 
   const [username, setUsername] = useState('');
   const [email, setEmail] = useState('');
@@ -47,7 +61,7 @@ function EditorProfile() {
   }
 
   return (
-    <form onSubmit={handleSubmit} className={clsx('cc-column', 'min-w-[18rem]', 'px-6 py-2')}>
+    <form onSubmit={handleSubmit} className={clsx('cc-column', 'w-[18rem]', 'px-6 py-2')}>
       <TextInput
         id='username'
         autoComplete='username'
@@ -80,7 +94,13 @@ function EditorProfile() {
         value={email}
         onChange={event => setEmail(event.target.value)}
       />
-      <SubmitButton className='self-center mt-6' text='Сохранить данные' loading={processing} disabled={!isModified} />
+      {errorProcessing ? <ProcessError error={errorProcessing} /> : null}
+      <SubmitButton
+        className='self-center mt-6'
+        text='Сохранить данные'
+        loading={processing}
+        disabled={!isModified || email == ''}
+      />
     </form>
   );
 }
diff --git a/rsconcept/frontend/src/utils/constants.ts b/rsconcept/frontend/src/utils/constants.ts
index 03502ba8..9086d417 100644
--- a/rsconcept/frontend/src/utils/constants.ts
+++ b/rsconcept/frontend/src/utils/constants.ts
@@ -113,6 +113,7 @@ export const storage = {
 export const globals = {
   tooltip: 'global_tooltip',
   password_tooltip: 'password_tooltip',
+  email_tooltip: 'email_tooltip',
   main_scroll: 'main_scroll',
   library_item_editor: 'library_item_editor',
   constituenta_editor: 'constituenta_editor'