diff --git a/account_ebics/models/ebics_userid.py b/account_ebics/models/ebics_userid.py
index c4a6ae9..cdbdb76 100644
--- a/account_ebics/models/ebics_userid.py
+++ b/account_ebics/models/ebics_userid.py
@@ -68,6 +68,7 @@ class EbicsUserID(models.Model):
         comodel_name="res.users",
         string="Users",
         required=True,
+        domain=[("share", "=", False)],
         help="Users who are allowed to use this EBICS UserID for "
         " bank transactions.",
     )