diff --git a/kfet/static/kfet/js/kfet.js b/kfet/static/kfet/js/kfet.js
index 1bdeef8e..0e2bad18 100644
--- a/kfet/static/kfet/js/kfet.js
+++ b/kfet/static/kfet/js/kfet.js
@@ -65,8 +65,11 @@ function getErrorsHtml(data) {
             content += '<li>'+data['errors']['missing_perms'][i]+'</li>';
         content += '</ul>';
     }
-    if ('negative' in data['errors'])
-        content += '<a class="btn btn-primary" href="/k-fet/accounts/'+account_data['trigramme']+'/edit" target="_blank">Autorisation de négatif requise</a>';
+    if ('negative' in data['errors']) {
+        for (var i=0; i<data['errors']['negative'].length; i++) {
+            content += '<a class="btn btn-primary" href="/k-fet/accounts/'+data['errors']['negative'][i]+'/edit" target="_blank" style="width:100%">Autorisation de négatif requise pour '+data['errors']['negative'][i]+'</a>';
+        }
+    }
     if ('addcost' in data['errors']) {
         content += '<ul>';
         if (data['errors']['addcost'].indexOf('__all__') != -1)
diff --git a/kfet/views.py b/kfet/views.py
index a2da8a7b..987fd3de 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -897,7 +897,7 @@ def kpsul_perform_operations(request):
         if missing_perms:
             data['errors']['missing_perms'] = missing_perms
         if stop:
-            data['errors']['negative'] = True
+            data['errors']['negative'] = [operationgroup.on_acc.trigramme]
         return JsonResponse(data, status=403)
 
     # If 1 perm is required, filling who perform the operations
@@ -1088,19 +1088,22 @@ def kpsul_cancel_operations(request):
         data['warnings']['already_canceled'] = opes_already_canceled
         return JsonResponse(data)
 
+    negative_accounts = []
     # Checking permissions or stop
     for account in to_accounts_balances:
         (perms, stop) = account.perms_to_perform_operation(
                 amount = to_accounts_balances[account])
         required_perms |= perms
         stop_all = stop_all or stop
+        if stop:
+            negative_accounts.append(account.trigramme)
 
     if stop_all or not request.user.has_perms(required_perms):
         missing_perms = get_missing_perms(required_perms, request.user)
         if missing_perms:
             data['errors']['missing_perms'] = missing_perms
         if stop_all:
-            data['errors']['negative'] = True
+            data['errors']['negative'] = negative_accounts
         return JsonResponse(data, status=403)
 
     canceled_by = required_perms and request.user.profile.account_kfet or None
@@ -1322,19 +1325,22 @@ def perform_transfers(request):
 
     stop_all = False
 
+    negative_accounts = []
     # Checking if ok on all accounts
     for account in to_accounts_balances:
         (perms, stop) = account.perms_to_perform_operation(
                 amount = to_accounts_balances[account])
         required_perms |= perms
         stop_all = stop_all or stop
+        if stop:
+            negative_accounts.append(account.trigramme)
 
     if stop_all or not request.user.has_perms(required_perms):
         missing_perms = get_missing_perms(required_perms, request.user)
         if missing_perms:
             data['errors']['missing_perms'] = missing_perms
         if stop_all:
-            data['errors']['negative'] = True
+            data['errors']['negative'] = negative_accounts
         return JsonResponse(data, status=403)
 
     # Creating transfer group