diff --git a/fet2020/finance/forms.py b/fet2020/finance/forms.py
index 26fd64f3..08441c30 100644
--- a/fet2020/finance/forms.py
+++ b/fet2020/finance/forms.py
@@ -103,12 +103,13 @@ class BillCreateForm(forms.ModelForm):
         file_field = cleaned_data.get("file_field")
 
         # check if resolution exists
-        try:
-            Resolution.objects.get(id=resolution)
-        except:
-            raise ValidationError(
-                f"Es gibt keinen Beschluss mit dieser ID. (Eingegebene ID: {resolution})"
-            )
+        if resolution != "":
+            try:
+                Resolution.objects.get(id=resolution)
+            except:
+                raise ValidationError(
+                    f"Es gibt keinen Beschluss mit dieser ID. (Eingegebene ID: {resolution})"
+                )
 
         # check that amount is valid because invalid amount is a NoneType.
         if amount: