diff --git a/kfet/static/kfet/js/kfet.js b/kfet/static/kfet/js/kfet.js
index bdf5b69b..6bd03a1f 100644
--- a/kfet/static/kfet/js/kfet.js
+++ b/kfet/static/kfet/js/kfet.js
@@ -133,6 +133,9 @@ function getErrorsHtml(data) {
             content += '<li>Montant invalide</li>';
         content += '</ul>';
     }
+    if ('account' in data['errors']) {
+        content += data['errors']['account'];
+    }
     return content;
 }
 
diff --git a/kfet/views.py b/kfet/views.py
index b6a3338a..823a205d 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1041,7 +1041,9 @@ def kpsul_perform_operations(request):
         operationgroup.comment = operationgroup.comment.strip()
         if not operationgroup.comment:
             data['errors']['need_comment'] = True
-            return JsonResponse(data, status=400)
+
+    if data['errors']:
+        return JsonResponse(data, status=400)
 
     if stop or not request.user.has_perms(required_perms):
         missing_perms = get_missing_perms(required_perms, request.user)