diff --git a/lang/en.json b/lang/en.json
index 040c1aa6f216ce7291bbfefd52db4f7c35555bcd..38b9ecd869e08b9492239573cb273c2fa5f6011f 100755
--- a/lang/en.json
+++ b/lang/en.json
@@ -158,6 +158,7 @@
 		"actions": "Actions",
 		"addNote": "Add note",
 		"filterInfo": "Filter by subject / reference",
-		"attachment": "attachment"
+		"attachment": "attachment",
+		"deleteSubtitution": "Delete subtitution"
 	}
 }
diff --git a/lang/fr.json b/lang/fr.json
index 7192a9a2b943a652ce65c909d762142d43a9849d..a9d8976703f807209e68a322a77dcb2456ee3a30 100755
--- a/lang/fr.json
+++ b/lang/fr.json
@@ -158,6 +158,7 @@
 		"actions": "Actions",
 		"addNote": "Ajouter un commentaire",
 		"filterInfo": "Filtrer par objet / référence",
-		"attachment": "annexe"
+		"attachment": "annexe",
+		"deleteSubtitution": "Supprimer la délégation"
 	}
 }
diff --git a/src/frontend/app/profile/profile.component.html b/src/frontend/app/profile/profile.component.html
index 0b5d001cf100cba67e0d5816b9f4eaf51d56d1c1..4b6611934a8f45e2f8bd063dffcd88f134692f80 100644
--- a/src/frontend/app/profile/profile.component.html
+++ b/src/frontend/app/profile/profile.component.html
@@ -242,7 +242,6 @@
                                         <mat-form-field style="width:100%">
                                             <mat-select placeholder="{{'lang.chooseSubstitute' | translate}}" name="usersRest"
                                                 [(ngModel)]="profileInfo.substitute">
-                                                <mat-option value=""></mat-option>
                                                 <ng-container *ngFor="let userRest of usersRest">
                                                     <mat-option *ngIf="userRest.id !== profileInfo.id"
                                                         [value]="userRest.id">
@@ -250,10 +249,14 @@
                                                         {{userRest.lastname}}</mat-option>
                                                 </ng-container>
                                             </mat-select>
+                                            <button matSuffix *ngIf="profileInfo.substitute != null" mat-icon-button type="button"
+                                                (tap)="profileInfo.substitute = null" color="warn" title="{{'lang.deleteSubtitution' | translate}}">
+                                                <mat-icon fontSet="fas" fontIcon="fa-times fa-2x"></mat-icon>
+                                            </button>
                                         </mat-form-field>
                                     </div>
                                 </div>
-                                <fieldset *ngIf="this.profileInfo.substitute !== '' && this.profileInfo.substitute !== undefined">
+                                <fieldset *ngIf="profileInfo.substitute != null">
                                     <legend align="left">{{'lang.signSubstituted' | translate}} :</legend>
                                     <ng-container>
                                         <button type="button" class="signListButton" mat-stroked-button *ngFor="let signature of signaturesService.signaturesList; let i=index" (click)="toggleSignature(i)" [class.selected]="signature.substituted"><img [src]="sanitizer.bypassSecurityTrustUrl('data:image/png;base64,' + signature.encodedSignature)"/></button>
diff --git a/src/frontend/app/profile/profile.component.ts b/src/frontend/app/profile/profile.component.ts
index 699eec9d0570ec58274b311e8945a9d423cfee12..8c26988154c38439f872e582a02aca35b881fb27 100644
--- a/src/frontend/app/profile/profile.component.ts
+++ b/src/frontend/app/profile/profile.component.ts
@@ -22,7 +22,7 @@ export class ProfileComponent implements OnInit {
     @ViewChild('passwordContent') passwordContent: MatExpansionPanel;
 
     profileInfo: any = {
-        substitute: '',
+        substitute: null,
         preferences: []
     };
     hideCurrentPassword: Boolean = true;
@@ -204,7 +204,7 @@ export class ProfileComponent implements OnInit {
             'substitute': this.profileInfo.substitute,
         };
 
-        if (this.profileInfo.substitute !== '') {
+        if (this.profileInfo.substitute !== null) {
             alert('Vous avez choisi une délégation, vous ne pourrez plus viser ou signer de courrier.');
         }
 
@@ -257,7 +257,7 @@ export class ProfileComponent implements OnInit {
                     this.closeProfile();
                 }
 
-                if (this.profileInfo.substitute !== '') {
+                if (this.profileInfo.substitute !== null) {
                     this.http.patch('../rest/users/' + this.signaturesService.userLogged.id + '/signatures/substituted', {'signatures': this.signaturesService.signaturesList})
                         .subscribe(() => { }, (err) => {
                             this.notificationService.handleErrors(err);