What you do is you a separate list of known pins and work out the most likely pin is. Then you assume that all of your new Debit cards have that pin. Most won't have that pin, but for many of them you'll now have a working pin. For those you did not ever enter a wrong pin, so any sort of brute-force attempt detection software will never have any reason to suspect a thing.
That may or may not matter to you depending on your financial situation, but it's probably much better to be in a position where you are debating/challenging what you owe rather than what someone else owes you.
Note: I know that the mechanics are slightly different when you "run it as a credit card" rather than a debit card, but you may be in the same boat if the money has already left your bank account (unless Visa or MasterCard lean on the bank to make things go faster in such situations).