I found this company reporting to the credit bureaus that I am in collections on an account. Subsequently, I sent them a letter via certified mail to the address on my credit report same as on the XXXX website but it was returned undeliverable. Thinking this was an error, I re-sent the same letter again double checking the address. Unfortunately, based on me checking the USPS website for delivery confirmation the letter has still not been signed for and appears it is on its way back to me again. It seems that they are rejecting certified mail. It is unfair of them to report things on a persons credit report and then refuse to communicate via mail concerning the debt and how the error can be resolved.