Even if someone paid with a credit card that met you, and showed you photo ID, and signed the receipt, can do a chargeback, and you couldnt do a thing about it.
Well there are many things that could be done about it. Most of them legal
Lawsuits. Fraud charges.
The main risk would be everything was fabricated, which at these dollar amounts would not be worth it. If you had a someone elses credit card and wanted to use it to steal, you would be better off using it to buy items at a big store where it would be written off. Not dealing with an individual who has far more incentive to deal with getting back at you.