[sector]

I'd like to see a list of accepting/rejecting retailers, because this seems quite strange to me. A lot of companies use anti-fraud paper and secure inks to reduce alteration of receipts. I would expect that loss prevention groups would be less than thrilled with this app.

[eli]

Really? I assumed large retailers are pulling up an internal record of the original purchase when you make a return.

[sector]

Many retailers still sync up daily via batch processes creating a race condition where copies of a real receipt could be used at multiple locations on the same day.

There are also issues with exception handling processes that dictate what clerks are to do if there's a problem with a receipt that are likely exploitable if photo receipts are accepted.

As it stands these holes exist but the harm is reduced by the fact that if you want a fake receipt, you need the right receipt paper and printing equipment which basically means that only professional criminals have a shot at exploiting the problem.