I'm a newbie, but I'll try to answer for some of the experts.
scenario 1
1 - call the imaging place and see if they still have the debt or if they actually sold it to the CA. If they just assigned it to the CA, pay the imaging place and require a receipt showing paid in full.
2 - send a copy of the receipt via CMRRR to the CA stating that the debt has been paid in full and they are to stop contacting you. Do NOT use the words cease and decist - that implies you do not wish to work with the CA in any form or fashion and immediately puts you on the list of customers they will file judgements against. Add a line about since they never owned the debt and that it has been paid in full, they legally cannot report this account to the credit bureaus.
scenario 2
1 - the imaging place says that they did sell the debt
2 - send the CA a CMRRR letter stating that you will settle the debt for the amount requested as long as they will not report anything to the CRAs. When they return a written response agreeing to do so, send them a certified check, and copy of the agreement with your signature, via CMRRR again.
Please let us know which scenario worked for you. It will help others with a similar situation.
11/14/07 TU 567 - EQ 561 - EX 577
11/29/07 TU ??? - EQ 573 - EX ???
12/10/07 TU ??? - EQ 579 - EX ??? - 60% util - OOPS!