support transactions with special users as sender

A transfer including a car as source needs this

1 files changed, 3 insertions, 3 deletions

diff --git a/geldschieberbot.py b/geldschieberbot.py
index 20561c0..8b1cbbf 100644
--- a/geldschieberbot.py
+++ b/geldschieberbot.py
@@ -277,9 +277,9 @@ def transaction(sender, args, msg):
     if len(args) != 3:
         return None, 'not in form "{} amount recipient"'.format(args[0])
 
-    if not sender in num2name:
-        return None, 'you must register first'
-    else:
+    if not sender in balance:
+        if sender not in num2name:
+            return None, 'you must register first'
         sender = num2name[sender]
 
     if args[1] in balance: