Medical event XXXX/XXXX/XXXX. Medical insurer XXXX initially declined XXXX, but XXXX NV paid the claim XXXX/XXXX/XXXX, according to plan negotiated amounts. A series of debt collectors have been harassing for 4 years now. Repeated phone and written contact appeared to end in XXXX after my last correspondence, but now written demands have restarted. Each time, I provide a copy of the XXXX explanation of benefits showing payment to the service provider. Each time, the $ amount of the purported claim appears to change, though. An extra XXXX cents in XXXX, a XXXX instead of a XXXX in another, things that might seem like innocent typos, but which suggest also an attempt to look at the demand as a new claim. There was XXXX medical visit, and XXXX bill for services rendered, which was addressed by the insurer. And each time the debt collectors send a demand, it comes from another entity, most recently Central Credit Services with a XXXX mailing address for correspondence and an XXXX XXXX paying address ( the same address as the most recent XXXX demand from XXXX ). Most recently the claim is listed as XXXX of XXXX XXXX, who it appears obtained it from XXXX. This claim continues to be on my credit report, despite requests that they correct this. I am concerned not only about my situation, but that this may be a broader practice, an attempt to baffle the consumer ( or an elderly consumer 's family or estate handling their finances ) into thinking a bill is unpaid so that the debt purchaser gets some return on their investment. Thank you in advance for your assistance with this. 
