[zdc1]

Government insanity aside, the most insane part to me is that card networks allow partial refunds, but UPS wants to... mail a cheque?

[Maxion]

They probably have this type of cash in some short term investment vechicle to earn extra cash, so they have to hold on to it for an average of n days. Writing a cheque and mailing it basically gives them quite a few more extra days of interest payments.

[c0balt]

Maybe they want to play a similar game to mail-in rebates? Or it could just be an old process that has yet to be modernized