diff --git a/client/src/app/core/repositories/assignments/assignment-repository.service.ts b/client/src/app/core/repositories/assignments/assignment-repository.service.ts
index 764a181d7..aafd8cc90 100644
--- a/client/src/app/core/repositories/assignments/assignment-repository.service.ts
+++ b/client/src/app/core/repositories/assignments/assignment-repository.service.ts
@@ -130,9 +130,9 @@ export class AssignmentRepositoryService extends BaseIsAgendaItemAndListOfSpeake
      * of the candidate. Else, the candidate will be added if not on the list,
      * and removed if on the list
      */
-    public async changeCandidate(user: ViewUser, assignment: ViewAssignment, adding?: boolean): Promise<void> {
-        const data = { user: user.id };
-        if (assignment.candidates.some(candidate => candidate.id === user.id) && adding !== true) {
+    public async changeCandidate(userId: number, assignment: ViewAssignment, adding?: boolean): Promise<void> {
+        const data = { user: userId };
+        if (assignment.candidates.some(candidate => candidate.id === userId) && adding !== true) {
             await this.httpService.delete(this.restPath + assignment.id + this.candidatureOtherPath, data);
         } else if (adding !== false) {
             await this.httpService.post(this.restPath + assignment.id + this.candidatureOtherPath, data);
diff --git a/client/src/app/core/repositories/users/user-repository.service.ts b/client/src/app/core/repositories/users/user-repository.service.ts
index db2f865b7..5f0f56e47 100644
--- a/client/src/app/core/repositories/users/user-repository.service.ts
+++ b/client/src/app/core/repositories/users/user-repository.service.ts
@@ -22,6 +22,11 @@ export interface MassImportResult {
     errors: { [id: number]: string };
 }
 
+export interface NewUser {
+    id: number;
+    name: string;
+}
+
 /**
  * type for determining the user name from a string during import.
  * See {@link parseUserString} for implementations
@@ -370,10 +375,10 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User, UserTi
      * @param user: String to create the user from
      * @returns Promise with a created user id and the raw name used as input
      */
-    public async createFromString(user: string): Promise<{ id: number; name: string }> {
+    public async createFromString(user: string): Promise<NewUser> {
         const newUser = this.parseUserString(user);
         const createdUser = await this.create(newUser);
-        return { id: createdUser.id, name: user };
+        return { id: createdUser.id, name: user } as NewUser;
     }
 
     /**
diff --git a/client/src/app/shared/components/sorting-list/sorting-list.component.html b/client/src/app/shared/components/sorting-list/sorting-list.component.html
index bd4660240..93d277810 100644
--- a/client/src/app/shared/components/sorting-list/sorting-list.component.html
+++ b/client/src/app/shared/components/sorting-list/sorting-list.component.html
@@ -15,7 +15,7 @@
         <div class="section-two">
             <!-- {number}. {item.getTitle()} -->
             <span *ngIf="count">{{ i + 1 }}.&nbsp;</span>
-            <span>{{ item.getTitle() }}</span>
+            <span>{{ item?.getTitle() }}</span>
         </div>
         <div class="section-three">
             <!-- Extra controls slot using implicit template references -->
diff --git a/client/src/app/site/agenda/components/list-of-speakers/list-of-speakers.component.ts b/client/src/app/site/agenda/components/list-of-speakers/list-of-speakers.component.ts
index a33669541..1cb050d20 100644
--- a/client/src/app/site/agenda/components/list-of-speakers/list-of-speakers.component.ts
+++ b/client/src/app/site/agenda/components/list-of-speakers/list-of-speakers.component.ts
@@ -512,11 +512,11 @@ export class ListOfSpeakersComponent extends BaseViewComponent implements OnInit
      *
      * @param username The name of the new user.
      */
-    public onCreateUser(username: string): void {
-        this.userRepository.createFromString(username).then(result => {
-            this.addNewSpeaker(result.id);
-        });
+    public async onCreateUser(username: string): Promise<void> {
+        const newUser = await this.userRepository.createFromString(username);
+        this.addNewSpeaker(newUser.id);
     }
+
     /**
      * Triggers an update of the filter for the list of available potential speakers
      * (triggered on an update of users or config)
diff --git a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.html b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.html
index 31a97a121..6ac71094f 100644
--- a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.html
+++ b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.html
@@ -186,7 +186,14 @@
                                     [multiple]="false"
                                     placeholder="{{ 'Select a new candidate' | translate }}"
                                     [inputListValues]="filteredCandidates"
-                                ></os-search-value-selector>
+                                    [showNotFoundButton]="true"
+                                    (clickNotFound)="createNewCandidate($event)"
+                                >
+                                    <ng-container notFoundDescription>
+                                        <mat-icon>add</mat-icon>
+                                        {{ 'Create user' | translate }}
+                                    </ng-container>
+                                </os-search-value-selector>
                             </mat-form-field>
                         </form>
                     </div>
diff --git a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
index 199757ebb..736ad9944 100644
--- a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
+++ b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
@@ -338,9 +338,8 @@ export class AssignmentDetailComponent extends BaseViewComponent implements OnIn
      * @param userId the id of a ViewUser
      */
     public async addUser(userId: number): Promise<void> {
-        const user = this.userRepo.getViewModel(userId);
-        if (user) {
-            await this.repo.changeCandidate(user, this.assignment, true).catch(this.raiseError);
+        if (userId) {
+            await this.repo.changeCandidate(userId, this.assignment, true).catch(this.raiseError);
         }
     }
 
@@ -350,7 +349,15 @@ export class AssignmentDetailComponent extends BaseViewComponent implements OnIn
      * @param candidate A ViewAssignmentUser currently in the list of related users
      */
     public async removeUser(candidate: ViewAssignmentRelatedUser): Promise<void> {
-        await this.repo.changeCandidate(candidate.user, this.assignment, false).catch(this.raiseError);
+        await this.repo.changeCandidate(candidate.user.id, this.assignment, false).catch(this.raiseError);
+    }
+
+    /**
+     * Creates unfound candidate on the fly and add the the list
+     */
+    public async createNewCandidate(username: string): Promise<void> {
+        const newUserObj = await this.userRepo.createFromString(username);
+        await this.addUser(newUserObj.id);
     }
 
     /**
diff --git a/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.html b/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.html
index c32c99510..b1298ef51 100644
--- a/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.html
+++ b/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.html
@@ -66,7 +66,9 @@
                 <mat-icon>picture_as_pdf</mat-icon>
                 <span>{{ 'PDF' | translate }}</span>
             </button>
-            <mat-divider *osPerms="['core.can_manage_projector', 'agenda.can_manage', 'core.can_see_history']"></mat-divider>
+            <mat-divider
+                *osPerms="['core.can_manage_projector', 'agenda.can_manage', 'core.can_see_history']"
+            ></mat-divider>
             <!-- Project -->
             <os-projector-button
                 [object]="motion"
@@ -627,7 +629,14 @@
                         [multiple]="true"
                         placeholder="{{ 'Submitters' | translate }}"
                         [inputListValues]="submitterObserver"
-                    ></os-search-value-selector>
+                        [showNotFoundButton]="true"
+                        (clickNotFound)="createNewSubmitter($event)"
+                    >
+                        <ng-container notFoundDescription>
+                            <mat-icon>add</mat-icon>
+                            {{ 'Create user' | translate }}
+                        </ng-container>
+                    </os-search-value-selector>
                 </mat-form-field>
             </ng-container>
         </div>
@@ -843,7 +852,14 @@
                             [multiple]="true"
                             placeholder="{{ 'Supporters' | translate }}"
                             [inputListValues]="supporterObserver"
-                        ></os-search-value-selector>
+                            [showNotFoundButton]="true"
+                            (clickNotFound)="createNewSupporter($event)"
+                        >
+                            <ng-container notFoundDescription>
+                                <mat-icon>add</mat-icon>
+                                {{ 'Create user' | translate }}
+                            </ng-container>
+                        </os-search-value-selector>
                     </mat-form-field>
                 </div>
             </div>
diff --git a/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.ts b/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.ts
index 83c80175d..0735c7f71 100644
--- a/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.ts
+++ b/client/src/app/site/motions/modules/motion-detail/components/motion-detail/motion-detail.component.ts
@@ -29,7 +29,7 @@ import { MotionRepositoryService, ParagraphToChoose } from 'app/core/repositorie
 import { StatuteParagraphRepositoryService } from 'app/core/repositories/motions/statute-paragraph-repository.service';
 import { WorkflowRepositoryService } from 'app/core/repositories/motions/workflow-repository.service';
 import { TagRepositoryService } from 'app/core/repositories/tags/tag-repository.service';
-import { UserRepositoryService } from 'app/core/repositories/users/user-repository.service';
+import { NewUser, UserRepositoryService } from 'app/core/repositories/users/user-repository.service';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import { DiffLinesInParagraph, LineRange } from 'app/core/ui-services/diff.service';
 import { LinenumberingService } from 'app/core/ui-services/linenumbering.service';
@@ -1705,6 +1705,31 @@ export class MotionDetailComponent extends BaseViewComponent implements OnInit,
         }
     }
 
+    public async createNewSubmitter(username: string): Promise<void> {
+        const newUserObj = await this.createNewUser(username);
+        this.addNewUserToFormCtrl(newUserObj, 'submitters_id');
+    }
+
+    public async createNewSupporter(username: string): Promise<void> {
+        const newUserObj = await this.createNewUser(username);
+        this.addNewUserToFormCtrl(newUserObj, 'supporters_id');
+    }
+
+    private addNewUserToFormCtrl(newUserObj: NewUser, controlName: string): void {
+        const control = this.contentForm.get(controlName);
+        let currentSubmitters: number[] = control.value;
+        if (currentSubmitters?.length) {
+            currentSubmitters.push(newUserObj.id);
+        } else {
+            currentSubmitters = [newUserObj.id];
+        }
+        control.setValue(currentSubmitters);
+    }
+
+    private createNewUser(username: string): Promise<NewUser> {
+        return this.userRepo.createFromString(username);
+    }
+
     public swipe(e: TouchEvent, when: string): void {
         const coord: [number, number] = [e.changedTouches[0].pageX, e.changedTouches[0].pageY];
         const time = new Date().getTime();