[Firehed]

Recognition issues are comparatively easy to fight (unless it was an Amex payment, as they charge merchants more to get more screwed over) but you still get dinged with the chargeback fee and potentially a higher discount* rate because of the larger percentage of payments that have been charged back.

* Despite the name, you want the lowest discount rate you can get: it's the fee charged by your acquiring bank on top of interchange, and is basically the only thing in credit card payments that you have any ability to negotiate. As you'd expect, having more chargebacks hinders your ability to get the discount rate lowered.