diff --git a/src/components/blocs/identifiers/index.js b/src/components/blocs/identifiers/index.js
index a634b97f..9c5e541a 100644
--- a/src/components/blocs/identifiers/index.js
+++ b/src/components/blocs/identifiers/index.js
@@ -1,30 +1,37 @@
-import { Col, Modal, ModalContent, ModalTitle, Text } from '@dataesr/react-dsfr';
+import {
+  Col,
+  Modal,
+  ModalContent,
+  ModalTitle,
+  Text,
+} from '@dataesr/react-dsfr';
 import { useState } from 'react';
 
-import IdentifierForm from '../../forms/identifier';
-import ExpendableListCards from '../../card/expendable-list-cards';
-import {
-  Bloc,
-  BlocActionButton,
-  BlocContent,
-  BlocModal,
-  BlocTitle,
-} from '../../bloc';
-import KeyValueCard from '../../card/key-value-card';
 import useEnums from '../../../hooks/useEnums';
 import useFetch from '../../../hooks/useFetch';
 import useNotice from '../../../hooks/useNotice';
 import useUrl from '../../../hooks/useUrl';
 import api from '../../../utils/api';
+import getLink from '../../../utils/get-links';
 import { getTvaIntraFromSiren } from '../../../utils/get-tva-intra';
 import {
   deleteError,
   deleteSuccess,
+  saveDuplicate,
   saveError,
   saveSuccess,
 } from '../../../utils/notice-contents';
-import getLink from '../../../utils/get-links';
+import {
+  Bloc,
+  BlocActionButton,
+  BlocContent,
+  BlocModal,
+  BlocTitle,
+} from '../../bloc';
+import ExpendableListCards from '../../card/expendable-list-cards';
+import KeyValueCard from '../../card/key-value-card';
 import CopyButton from '../../copy/copy-button';
+import IdentifierForm from '../../forms/identifier';
 
 export default function IdentifiersComponent() {
   const { notice } = useNotice();
@@ -40,8 +47,8 @@ export default function IdentifiersComponent() {
     const method = itemId ? 'patch' : 'post';
     const saveUrl = itemId ? `${url}/${itemId}` : url;
     await api[method](saveUrl, body)
-      .then(() => {
-        notice(saveSuccess);
+      .then((response) => {
+        notice(response.status === 204 ? saveDuplicate : saveSuccess);
         reload();
       })
       .catch(() => notice(saveError));
@@ -78,13 +85,13 @@ export default function IdentifiersComponent() {
   const renderCards = () => {
     if (!data) return null;
     const list = [];
-    const inactives = data.data.filter((el) => (el.active === false));
-    const actives = data.data.filter((el) => (el.active !== false));
+    const inactives = data.data.filter((el) => el.active === false);
+    const actives = data.data.filter((el) => el.active !== false);
     const orderedList = [...actives, ...inactives];
 
     if (data) {
       orderedList?.forEach((el) => {
-        const inactive = (el.active === false);
+        const inactive = el.active === false;
         let siretCard = el.value;
 
         if (el.type === 'siret') {
@@ -116,7 +123,7 @@ export default function IdentifiersComponent() {
         if (el.type !== 'siret' && el.type !== 'cnrs-unit') {
           list.push(
             <KeyValueCard
-              cardKey={options?.find((type) => (el.type === type.value))?.label}
+              cardKey={options?.find((type) => el.type === type.value)?.label}
               cardValue={el.value}
               className={`card-${apiObject}`}
               copy
diff --git a/src/components/notice/index.js b/src/components/notice/index.js
index c95a136f..60a56dc6 100644
--- a/src/components/notice/index.js
+++ b/src/components/notice/index.js
@@ -1,11 +1,12 @@
 import PropTypes from 'prop-types';
+
 import usePausableTimer from '../../hooks/usePausableTimer';
 
 import './notice.scss';
 
 export default function Notice({
-  content,
   autoDismissAfter,
+  content,
   remove,
   type,
 }) {
@@ -43,14 +44,14 @@ export default function Notice({
 }
 
 Notice.propTypes = {
-  content: PropTypes.string,
   autoDismissAfter: PropTypes.number,
+  content: PropTypes.string,
   remove: PropTypes.func.isRequired,
   type: PropTypes.oneOf(['info', 'success', 'error', 'warning']),
 };
 
 Notice.defaultProps = {
-  content: '',
   autoDismissAfter: 6000,
+  content: '',
   type: 'info',
 };
diff --git a/src/hooks/useNotice.js b/src/hooks/useNotice.js
index 7a935f3a..02959b96 100644
--- a/src/hooks/useNotice.js
+++ b/src/hooks/useNotice.js
@@ -1,12 +1,13 @@
+import PropTypes from 'prop-types';
 import {
   createContext,
-  useContext,
-  useState,
   useCallback,
+  useContext,
   useMemo,
+  useState,
 } from 'react';
 import { createPortal } from 'react-dom';
-import PropTypes from 'prop-types';
+
 import Notice from '../components/notice';
 
 const NoticeContext = createContext();
diff --git a/src/utils/notice-contents.js b/src/utils/notice-contents.js
index 872cbdd0..65094e20 100644
--- a/src/utils/notice-contents.js
+++ b/src/utils/notice-contents.js
@@ -1,4 +1,20 @@
-export const deleteError = { content: "Une erreur s'est produite. L'élément n'a pas pu être supprimé", autoDismissAfter: 6000, type: 'error' };
-export const saveError = { content: "Une erreur s'est produite lors de l'envoi du formulaire.", autoDismissAfter: 6000, type: 'error' };
-export const saveSuccess = { content: 'Vos modifications ont été correctement enregistrées', autoDismissAfter: 6000, type: 'success' };
-export const deleteSuccess = { content: "L'élément a été supprimé avec succès.", autoDismissAfter: 6000, type: 'success' };
+export const deleteError = {
+  content: "Une erreur s'est produite. L'élément n'a pas pu être supprimé",
+  type: 'error',
+};
+export const deleteSuccess = {
+  content: "L'élément a été supprimé avec succès.",
+  type: 'success',
+};
+export const saveError = {
+  content: "Une erreur s'est produite lors de l'envoi du formulaire.",
+  type: 'error',
+};
+export const saveSuccess = {
+  content: 'Vos modifications ont été correctement enregistrées',
+  type: 'success',
+};
+export const saveDuplicate = {
+  content: "Vos modifications n'ont pas été prises en compte car un élément identique existait déjà.",
+  type: 'warning',
+};