When you cashed a check for a product well over a year ago, pocketed the money, haven't sent the product that you accepted payment for, and you won't respond to any form of communication, including a demand for a refund, I think there's a few different Law-dogs in the country who might think a record of doing that suggests you're a scammer... whether USPS or local LEOs.
You of course can argue it's just civil, not fraud. You definitely won't get any action by doing nothing in response to such indifference.
Ask Jonathan Ciener how that works - he operated like was the model for how Tyler is operating today from what customers here and elsewhere are reporting. I think it was multiple charges for minor acts of fraud.
Sheriff Arrests Jonathan Arthur Ciener On Fraud Charges
But hey... once they've engaged a lawyer, gone through processing... whether or not it goes to trial, the scammer might decide it is easier to act like a businessman than a grifter.
This is not my issue. But if some business who has cashed my check and isn't heard from by a year later, I'm going to use all legitimate means to make them at least as annoyed as they've annoyed me. Among the options are both civil and criminal complaints.
They can argue they're not actually fraudsters as they appear to be.