<prompt> Human: My wife is getting LASIK surgery soon, and we were offered a 5 discount off the 4000 cost if we pay in cash. Normally I put all possible expenses on credit card so that if theres any sort of accounting error I have a recourse and an independent record of payment. Ive never made a cash transaction anywhere close to this magnitude. I understand that the surgeon is trying to avoid credit card fees or whatever, and its not some fly by night operation, but it still feels weird. Is paying in cash a bad idea? In pfs opinion, is the 200 savings worth the risk? Any advice would be appreciated.  <response>: go for it. Discounts are a great reason to pay cash. There will be plenty of paper work showing you paid. 