diff --git a/services/madoc-ts/src/frontend/site/features/reviewer/AssignManifestToUser.tsx b/services/madoc-ts/src/frontend/site/features/reviewer/AssignManifestToUser.tsx
index 56e3438eb..8619d6955 100644
--- a/services/madoc-ts/src/frontend/site/features/reviewer/AssignManifestToUser.tsx
+++ b/services/madoc-ts/src/frontend/site/features/reviewer/AssignManifestToUser.tsx
@@ -34,6 +34,16 @@ export const AssignManifestToUser: React.FC = () => {
       throwOnError: true,
     }
   );
+  const [unassignUser] = useMutation(
+    async (taskId: string) => {
+      if (projectId) {
+        await api.updateTask(taskId, { status: -1, status_text: 'unassigned' });
+      }
+    },
+    {
+      throwOnError: true,
+    }
+  );
 
   if (project.claimGranularity === 'canvas' /*|| project.contributionMode !== 'transcription'*/) {
     return null;
@@ -47,7 +57,7 @@ export const AssignManifestToUser: React.FC = () => {
     <ModalButton
       as={Button}
       title={t('Assign manifest to user')}
-      render={() => <AssignUserToManifestTask onAssign={assignUser} />}
+      render={() => <AssignUserToManifestTask onAssign={assignUser} onUnassign={unassignUser} />}
     >
       {t('Assign')}
     </ModalButton>
diff --git a/services/madoc-ts/src/frontend/site/features/reviewer/AssignUserToManifestTask.tsx b/services/madoc-ts/src/frontend/site/features/reviewer/AssignUserToManifestTask.tsx
index 2216610c8..ae8a456d4 100644
--- a/services/madoc-ts/src/frontend/site/features/reviewer/AssignUserToManifestTask.tsx
+++ b/services/madoc-ts/src/frontend/site/features/reviewer/AssignUserToManifestTask.tsx
@@ -12,9 +12,10 @@ import { TableContainer, TableRow, TableRowLabel } from '../../../shared/layout/
 import { AutocompleteUser, UserAutocomplete } from '../../../shared/components/UserAutocomplete';
 import { useManifestTask } from '../../hooks/use-manifest-task';
 
-export const AssignUserToManifestTask: React.FC<{ onAssign: (user: AutocompleteUser) => Promise<void> }> = ({
-  onAssign,
-}) => {
+export const AssignUserToManifestTask: React.FC<{
+  onAssign: (user: AutocompleteUser) => Promise<void>;
+  onUnassign: (taskId: string) => Promise<void>;
+}> = ({ onAssign, onUnassign }) => {
   const { t } = useTranslation();
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState('');
@@ -44,6 +45,19 @@ export const AssignUserToManifestTask: React.FC<{ onAssign: (user: AutocompleteU
     }
   };
 
+  const unassignManifest = (taskId: string) => {
+    setError('');
+    setIsLoading(true);
+    onUnassign(taskId)
+      .then(async () => {
+        await refetch();
+        setIsLoading(false);
+      })
+      .catch((err: ApiError) => {
+        setError(err.message);
+      });
+  };
+
   const alreadyAssigned = crowdsourcingManifestTasks
     .map(task => {
       const user = task.assignee ? parseUrn(task.assignee.id) : null;
@@ -78,6 +92,11 @@ export const AssignUserToManifestTask: React.FC<{ onAssign: (user: AutocompleteU
                 t('unassigned')
               )}
               <TableRowLabel $flex>{task.name}</TableRowLabel>
+              <TableRowLabel>
+                <Button $error onClick={() => unassignManifest(task.id as string)}>
+                  {t('Unassign')}
+                </Button>
+              </TableRowLabel>
             </TableRow>
           ))}
         </TableContainer>