"Who doesn't need proof they bought a donut?: TOTAL PAYMENTS  TOTAL TIPS  3.55  0.00  Balance Due  0.00  Thank you!  Freshest Donuts from  the Freshest Donut Pros  ""I bought a donut and they gave me a rece-  ipt for the donut. I don't need a receipt  for the donut. I give you money and you 8-  ive me the donut, end of transaction. We  don't need to bring ink and paper into th-  is. I can't imagine a scenario that I wou-  ld have to prove that I bought a donut.""  -Mitch Hedberg Who doesn't need proof they bought a donut?"