diff --git a/kfet/models.py b/kfet/models.py
index db7381e5..f9cc321b 100644
--- a/kfet/models.py
+++ b/kfet/models.py
@@ -569,8 +569,7 @@ class Operation(models.Model):
     def is_checkout(self):
         return (self.type == Operation.DEPOSIT or
                 self.type == Operation.WITHDRAW or
-                (self.type == Operation.PURCHASE and self.group and
-                 self.group.on_acc.is_cash)
+                (self.type == Operation.PURCHASE and self.group.on_acc.is_cash)
                 )
 
     def __str__(self):