Originally Posted by
tev9999
Costco once refunded me in cash for something I bought at Costco.com on a Visa. Apparently they can only refund to Amex in store and I never got the chance to offer an amex card. I think it was about $100. I'm guessing abuse would be spotted pretty quickly.
At one point people were using that trick to return diamond rings bought at costco.com. Not sure what happens if you try it now.