You can send them a cease and desist letter, make sure to keep copies. If they keep harassing request that they produce original documents bearing your original signature agreeing to such charges (THEY DO NOT HAVE THIS, BECAUSE THEY ARE SCAMMERS, HENCE THEY DON'T HAVE ACCESS TO THIS INFO). This should effectively stop them, the moment they see you are proceeding according to your consumer rights they will bail on your case and move on to the next "sucker". You can dispute any wrongful reports they may have filed with the credit bureaus by submitting your letters and advising they never replied. I have gone to court, yes some of these idiots think they can sue you and extort you by filing in the local civil courts. But they didn't count on me knowing my rights, ANY JUDGE will agree if you request that these scammers produce a list of documents, the longer and the harder to obtain the better. The burden of proof is on them so let them try to locate EVERY SINGLE ONE of these ORIGINAL papers. The judge also needs for them to prove beyond doubt that you owe such money and that they have the paperwork to substantiate it. 95% of the time they WILL BAIL AT THIS POINT and the judge will dismiss it. MAKE SURE YOU GET A COPY OF THE DISMISSAL because the scammer will fwd this to the next scammer in line and they may try to start collection procedures again. But all you need to do is send them the dismissal signed by the judge and they can suck it! That should stop them right there. Been there, done that and i am no lawyer. ALWAYS FIGHT BACK!!! They are counting on people getting scared with heir cheap tactics. IGNORANCE IS NOT AN OPTION, there are too many low lives out there. ALSO NEVER EVER UNDER ANY CIRCUMSTANCE MAKE EVEN A SMALL $5.00 PAYMENT ON ANY ALLEGED DEBT THESE COLLECTORS TRY TO GET FROM YOU! They want you to at least pay a small payment and set up a payment plan, because the moment your small payment posts the debt's life gets renewed. EVERY DEBT HAS AN EXPIRATION DATE, NO COLLECTOR CAN LEGALLY TRY TO BILL YOU AFTER SAID EXPIRATION DEBT. This is why they keep trying to at least get you to pay something, the smallest amount is enough to "reset the timer" and on the other hand it is as if you are agreeing that you owe this debt when you don't even know if they are scamming you. Debts usually expire 4 to 7 years after the original date of service. This is why scammers try to collect before the debt expires, they know it is their best shot at trying to extort you. ALWAYS CALL THE ORIGINAL CREDITOR!!! If you do owe money to them then set up a payment plan with them. IF THESE SCAMMERS GIVE YOU THE "ORIGINAL CREDITOR'S PHONE #", DON'T CALL THAT NUMBER!!! IT IS NOT THE ORIGINAL CREDITOR, IT IS ANOTHER SCAMMER IN THE LONG LINE OF SCAM COLLECTORS. SO, with that said, always look up the phone number up. So, i post this advise on the internet whenever i come across these scammers so the next person they try to scam gets to know that you can effectively fight these jerks just by making use of your consumer rights. PASS THIS INFO ON UNTIL THEY GO OUT OF BUSINESS!!!