diff --git a/lang/en.json b/lang/en.json
index fbbb7663a1b759ed2f0d3e5d9e1af9765d3d3454..6caa89f9106d44ca577fb5597117ced67df0a76e 100755
--- a/lang/en.json
+++ b/lang/en.json
@@ -445,6 +445,11 @@
         "attachments": "Attachments",
         "emails": "Emails",
         "workflowTemplates": "Workflow templates",
-        "configurations": "Configurations"
+        "configurations": "Configurations",
+        "signaturesInDocAdded": "Signature (s) affixed to page (s) {{0}}",
+        "docIsInMailGroup": "This document is the result of a direct mail",
+        "makeActionOnDocInMailGroup": "Do you want to validate the other documents with the current stamps?",
+        "mailing": "Direct mail",
+        "delegatedUser": "Delegated user"
     }
-}
+}
\ No newline at end of file
diff --git a/lang/fr.json b/lang/fr.json
index f369a1ebc6e4b55620641adc1473879fb0542348..1c2a232735a6dfec05df7eaf260f45d1270f8c19 100755
--- a/lang/fr.json
+++ b/lang/fr.json
@@ -445,6 +445,7 @@
 		"configurations": "Configurations",
 		"docIsInMailGroup": "Ce document est issu d'un publipostage",
 		"makeActionOnDocInMailGroup": "Voulez-vous valider les autres documents avec les tampons actuels ?",
-		"mailing": "Publipostage"
+		"mailing": "Publipostage",
+		"delegatedUser": "Utilisateur délégué"
 	}
 }
diff --git a/src/frontend/app/profile/profile.component.html b/src/frontend/app/profile/profile.component.html
index d9fbb062b9c8f390b3566f16af851cdebdc435dd..3ebd5bdb7f0549e3d6a146d410f2f407e9d758d0 100644
--- a/src/frontend/app/profile/profile.component.html
+++ b/src/frontend/app/profile/profile.component.html
@@ -174,10 +174,11 @@
                 </ion-item>
             </ion-list>
             <ion-list *ngIf="authService.user.substitute === null">
-                <ion-item *ngFor="let user of userList">
-                    <ion-checkbox color="primary" slot="start" [value]="user" (ionChange)="selectSubstitute($event.detail.value)"></ion-checkbox>
+                <ion-item *ngFor="let user of userList" [disabled]="checkSubstitutes(user.id, user.substitute)">
+                    <ion-checkbox  color="primary" slot="start" [value]="user" (ionChange)="selectSubstitute($event.detail.value)"></ion-checkbox>
                     <ion-label>{{ user.firstname }} {{ user.lastname }}</ion-label>
-                    <ion-note slot="end">{{ user.email }}</ion-note>
+                    <ion-note *ngIf="!checkSubstitutes(user.id, user.substitute)" slot="end">{{ user.email }}</ion-note>
+                    <ion-note *ngIf="checkSubstitutes(user.id, user.substitute)" slot="end" color="danger">{{ 'lang.delegatedUser' | translate }}</ion-note>
                 </ion-item>
             </ion-list>
             <ng-container *ngIf="authService.user.substitute != null && signaturesService.signaturesList.length > 0">
diff --git a/src/frontend/app/profile/profile.component.ts b/src/frontend/app/profile/profile.component.ts
index 6ad3229d83e94084ea64bb7512f779b59bcbea0d..3e04009af8f3979f6776f72979b0805c5c0ec7ee 100644
--- a/src/frontend/app/profile/profile.component.ts
+++ b/src/frontend/app/profile/profile.component.ts
@@ -88,7 +88,7 @@ export class ProfileComponent implements OnInit {
 
     ngOnInit(): void {
         this.initProfileInfo();
-        this.getPassRules();
+        this.getPassRules(); 
     }
 
     dismissModal() {
@@ -101,7 +101,7 @@ export class ProfileComponent implements OnInit {
         } else if (ev.detail.value.length >= 3) {
             this.http.get('../rest/autocomplete/users?search=' + ev.detail.value).pipe(
                 tap((res: any) => {
-                    this.userList = res.filter((item: any) => item.id !== this.profileInfo.id);
+                    this.userList = res.filter((item: any) => item.id !== this.profileInfo.id);                                        
                 }),
                 catchError(err => {
                     this.notificationService.handleErrors(err);
@@ -408,4 +408,8 @@ export class ProfileComponent implements OnInit {
                 this.notificationService.success('lang.modificationSaved');
             });
     }
+
+    checkSubstitutes(id: number, substitute: boolean) {
+        return this.authService.user.substitutes.includes(id) || substitute === true ? true : false;
+    }
 }