I am one of the lawyers who has been battling these folks for years. I have looked at their procedures. They are a collection agency. With almost no exceptions, they will attempt to collect on any check sent to them by a merchant or other debt collector. They only require basic check information and the claim that the merchant tried to collect and didn't get paid within 10 days. Then, almost the only way to stop getting the threatening letters is to prove to them that you did not write the check. No amount of proof that you did not have criminal intent will stop the letters, emails and phone calls. And the fees are ridiculous, like a $5 "overpayment fee", to get a refund if you accidently paid them more than they were asking.
Passing a bad check is not a crime unless you know it's bad and are intending to rip-off the merchant. Just like using a credit card knowing you're not going to pay the bill is a crime. The real crime here is that DA's are allowing collection agencies to use DA's letterhead and authority to make phony threats, to extort hundreds of dollars in fees, on top of the check.
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