True...they could also take their normal fee and just never collect it.
I have a lawyer friend that will tell me all the time that people still have not paid on work he did 3-4 years ago...
So basically you charge your normal rate, wait 6 months to send a bill, then wait to worry about the bill, then make contact about setting up a payment plan, and blah blah blah...before you know it Mo is done at NU and no one gives a f#&%.