Hi, I just came across this thread when searching the net for the script of The Refund. This endeavor was re-triggered (i'd tried before) because I was hunting for a German name relating to water. The German word for Water is Wasser, and Wasserkopf is the main character in this play! So, in true stream of consciousness style, i searched the net for The Refund. I too enjoyed this play when in college.
To my delight, I found the script! Here is the for all those who enjoy this play by Fritz Karinthy:
Perspectives » Blog Archive » "The Refund" - Play by Fritz Karinthy
This is three years later, however... Enjoy!