[h1d]

1) What's the concern here?

2) Why does the seller have to guard the payment processor's IT infrastructure?

3) Certainly faster than counting cash on top of counting the reciepts.

4) The problem doesn't exactly lie in the cash less system. Dealing with complaint is your business' problem.

5) Reversing 1 entry isnt a nightmare.

6) Are you developing your own solution or something?