I never do these things, but in light of recent events I am doing one now. See, I am sick and tired of getting screwed by artists, and then getting taken advantage of when I try to be reasonable about it. Not doing it anymore, if you screw me over I will immediately seek to resolve the problem in the manner that is best for me, and I quite frankly don't give a shit whether or not it is inconvenient for you or not, or whether it puts you in a tight spot.

On a related note, I will no longer let commissions go beyond my deadline to get a charge back. Been screwed over too many times that way. If it is not done within a few weeks of the deadline, I will expect a refund. If a refund is not immediately given, I will file a charge back.