Grumman Aerospace sent North American Rockwell an invoice for towing the Apollo 13 Command Module back with the Lunar Module.
In response North American reminded Grumman that North American Rockwell had not received any payment for ferrying the Lunar Modules on previous trips to the moon.
Edit The picture seems to be blurry on lemmy here is a link of a higher resolution picture Link
It’s possible that the source of the document is the government itself, and the tow company maintained their end of the agreement.
I love that you call one of the largest defense contractors on the planet “the tow company”.