diff --git a/src/api/OnboardingApiClient.ts b/src/api/OnboardingApiClient.ts
index ae7c58c..4dad0ed 100644
--- a/src/api/OnboardingApiClient.ts
+++ b/src/api/OnboardingApiClient.ts
@@ -5,11 +5,9 @@ import {
 } from '@pagopa/selfcare-common-frontend/lib/utils/api-utils';
 import { storageTokenOps } from '@pagopa/selfcare-common-frontend/lib/utils/storage';
 import { ENV } from '../utils/env';
-import { CheckManagerDto } from './generated/onboarding/CheckManagerDto';
 import { createClient, WithDefaultsT } from './generated/onboarding/client';
 import { OnboardingUserDto } from './generated/onboarding/OnboardingUserDto';
 import { UserDataValidationDto } from './generated/onboarding/UserDataValidationDto';
-import { UserTaxCodeDto } from './generated/onboarding/UserTaxCodeDto';
 
 const withBearerAndInstitutionId: WithDefaultsT<'bearerAuth'> =
   (wrappedOperation) => (params: any) => {
@@ -41,16 +39,6 @@ const onRedirectToLogin = () =>
   );
 
 export const OnboardingApi = {
-  searchUserApi: async (user: UserTaxCodeDto): Promise<any> => {
-    const result = await apiClient.searchUserId({ body: user });
-    return extractResponse(result, 200, onRedirectToLogin);
-  },
-
-  checkManagerApi: async (user: CheckManagerDto): Promise<any> => {
-    const result = await apiClient.checkManager({ body: user });
-    return extractResponse(result, 200, onRedirectToLogin);
-  },
-
   validateLegalRepresentative: async (user: UserDataValidationDto): Promise<any> => {
     const result = await apiClient.validateUsingPOST({
       body: {
diff --git a/src/pages/addUserFlow/addManager/AddLegalRepresentativeForm.tsx b/src/pages/addUserFlow/addManager/AddLegalRepresentativeForm.tsx
index d33860e..ad065da 100644
--- a/src/pages/addUserFlow/addManager/AddLegalRepresentativeForm.tsx
+++ b/src/pages/addUserFlow/addManager/AddLegalRepresentativeForm.tsx
@@ -1,8 +1,6 @@
 import { Grid } from '@mui/material';
-
 import { ButtonNaked } from '@pagopa/mui-italia';
 import { TitleBox, useErrorDispatcher, useLoading } from '@pagopa/selfcare-common-frontend/lib';
-
 import { trackEvent } from '@pagopa/selfcare-common-frontend/lib/services/analyticsService';
 import { resolvePathVariables } from '@pagopa/selfcare-common-frontend/lib/utils/routes-utils';
 import { useFormik } from 'formik';
@@ -17,18 +15,14 @@ import { Party } from '../../../model/Party';
 import { AddedUsersList } from '../../../model/PartyUser';
 import { RequestOutcomeMessage } from '../../../model/UserRegistry';
 import {
-  checkManagerService,
   onboardingAggregatorService,
   onboardingPostUser,
-  searchUserService,
   validateLegalRepresentative,
 } from '../../../services/onboardingService';
 import { getLegalRepresentativeService } from '../../../services/usersService';
 import {
-  LOADING_TASK_CHECK_MANAGER,
   LOADING_TASK_GET_LEGAL_REPRESENTATIVE,
   LOADING_TASK_ONBOARDING_USER_WITH_LEGAL_REPRESENTATIVE,
-  LOADING_TASK_SEARCH_USER_PDV,
 } from '../../../utils/constants';
 import { ENV } from '../../../utils/env';
 import { findNewestManager, getOutcomeContent, renderErrorMessage } from '../utils/helpers';
@@ -62,8 +56,6 @@ export default function AddLegalRepresentativeForm({
 
   const requestId = uniqueId();
   const { t } = useTranslation();
-  const setLoadingSearchUserPDV = useLoading(LOADING_TASK_SEARCH_USER_PDV);
-  const setLoadingCheckManager = useLoading(LOADING_TASK_CHECK_MANAGER);
   const setLoadingGetLegalRepresentative = useLoading(LOADING_TASK_GET_LEGAL_REPRESENTATIVE);
   const setLoadingOnboarding = useLoading(LOADING_TASK_ONBOARDING_USER_WITH_LEGAL_REPRESENTATIVE);
   const addError = useErrorDispatcher();
@@ -104,68 +96,6 @@ export default function AddLegalRepresentativeForm({
       .finally(() => setLoadingGetLegalRepresentative(false));
   }, [productId, party]);
 
-  const searchUser = async (user: AddedUsersList) => {
-    setLoadingSearchUserPDV(true);
-    await searchUserService({ taxCode: user.taxCode })
-      .then(async (data) => {
-        if (data.id) {
-          await checkManager(data.id, user);
-        } else {
-          await validateUser(user);
-        }
-      })
-      .catch(async (error) => {
-        await validateUser(user);
-        addError({
-          id: `SEARCH_USER_ERROR`,
-          blocking: false,
-          error,
-          techDescription: `Something gone wrong while calling search-user`,
-          toNotify: true,
-        });
-      })
-      .finally(() => setLoadingSearchUserPDV(false));
-  };
-
-  const checkManager = async (userId: string, user: AddedUsersList) => {
-    setLoadingCheckManager(true);
-    checkManagerService({
-      institutionType: activeOnboardingOnSelectedProduct.institutionType as InstitutionTypeEnum,
-      origin: party?.origin,
-      originId: party?.originId,
-      productId,
-      subunitCode: party?.subunitCode,
-      taxCode: party.vatNumber,
-      userId,
-    })
-      .then(async (data) => {
-        if (data) {
-          setIsChangedManager(!data.result);
-          if (!data.result) {
-            trackEvent('CHANGE_LEGAL_REPRESENTATIVE', {
-              request_id: requestId,
-              party_id: party.partyId,
-              product_id: productId,
-              from: 'dashboard',
-            });
-          } else {
-            await validateUser(user);
-          }
-        }
-      })
-      .catch(async (error) => {
-        await validateUser(user);
-        addError({
-          id: `VALIDATE_USER_ERROR`,
-          blocking: false,
-          error,
-          techDescription: `Something gone wrong while calling validate-user`,
-          toNotify: true,
-        });
-      })
-      .finally(() => setLoadingCheckManager(false));
-  };
-
   const initialFormData = {
     taxCode: '',
     name: '',
@@ -179,9 +109,13 @@ export default function AddLegalRepresentativeForm({
     validate: (user) => validateManagerForm(user, addedUserList, t),
 
     onSubmit: async (user) => {
-      if (previousLegalRepresentative) {
-        await searchUser(user);
+      if (
+        previousLegalRepresentative?.fiscalCode &&
+        previousLegalRepresentative.fiscalCode !== user.taxCode
+      ) {
+        setIsChangedManager(true);
       } else {
+        setIsChangedManager(false);
         await validateUser(user);
       }
     },
diff --git a/src/services/__mocks__/usersService.ts b/src/services/__mocks__/usersService.ts
index a6bb4a3..03b3b14 100644
--- a/src/services/__mocks__/usersService.ts
+++ b/src/services/__mocks__/usersService.ts
@@ -11,10 +11,8 @@ import { mockedProductUserResource } from '../../api/__mocks__/DashboardApiClien
 import { CheckUserResponse } from '../../api/generated/b4f-dashboard/CheckUserResponse';
 import { ProductUserResource } from '../../api/generated/b4f-dashboard/ProductUserResource';
 import { UserCountResource } from '../../api/generated/b4f-dashboard/UserCountResource';
-import { CheckManagerDto } from '../../api/generated/onboarding/CheckManagerDto';
 import { OnboardingUserDto } from '../../api/generated/onboarding/OnboardingUserDto';
 import { UserDataValidationDto } from '../../api/generated/onboarding/UserDataValidationDto';
-import { UserTaxCodeDto } from '../../api/generated/onboarding/UserTaxCodeDto';
 import { Party, UserRole, UserStatus } from '../../model/Party';
 import { PartyGroup, PartyGroupStatus } from '../../model/PartyGroup';
 import {
@@ -1350,14 +1348,6 @@ export const fetchUserGroups = (
   return Promise.resolve(userGroups);
 };
 
-export const searchUserMocked = (_user: UserTaxCodeDto): Promise<any> =>
-  Promise.resolve({
-    id: '121312312',
-  });
-
-export const checkManagerMocked = (_user: CheckManagerDto): Promise<any> =>
-  Promise.resolve({ result: false });
-
 export const validateLegalRepresentativeMocked = (_user: UserDataValidationDto): Promise<void> =>
   new Promise((resolve) => resolve());
 
diff --git a/src/services/onboardingService.ts b/src/services/onboardingService.ts
index 5343fa8..651ce1a 100644
--- a/src/services/onboardingService.ts
+++ b/src/services/onboardingService.ts
@@ -1,33 +1,11 @@
-import { CheckManagerDto } from '../api/generated/onboarding/CheckManagerDto';
 import { OnboardingUserDto } from '../api/generated/onboarding/OnboardingUserDto';
 import { UserDataValidationDto } from '../api/generated/onboarding/UserDataValidationDto';
-import { UserTaxCodeDto } from '../api/generated/onboarding/UserTaxCodeDto';
 import { OnboardingApi } from '../api/OnboardingApiClient';
 import {
-  checkManagerMocked,
   onboardingPostUserMocked,
-  searchUserMocked,
   validateLegalRepresentativeMocked,
 } from './__mocks__/usersService';
 
-export const searchUserService = (userTaxCode: UserTaxCodeDto): Promise<any> => {
-  /* istanbul ignore if */
-  if (process.env.REACT_APP_API_MOCK_PARTY_USERS === 'true') {
-    return searchUserMocked(userTaxCode);
-  } else {
-    return OnboardingApi.searchUserApi(userTaxCode);
-  }
-};
-
-export const checkManagerService = (user: CheckManagerDto): Promise<any> => {
-  /* istanbul ignore if */
-  if (process.env.REACT_APP_API_MOCK_PARTY_USERS === 'true') {
-    return checkManagerMocked(user);
-  } else {
-    return OnboardingApi.checkManagerApi(user);
-  }
-};
-
 export const validateLegalRepresentative = (user: UserDataValidationDto): Promise<any> => {
   /* istanbul ignore if */
   if (process.env.REACT_APP_API_MOCK_PARTY_USERS === 'true') {