On XXXX XXXX I personally mailed Experian a request to investigate XXXX negative accounts I had listed on my Experian credit report. On XXXX XXXX they mailed me a letter stating that they deemed my request as " not sent by me '' and that they were not going to complete the requested investigation. I contacted them by phone to explain that it was sent by and to request instructions on how to prove that it was sent by me. Their response was that I could n't prove it and all I could do was to resend the same request. I explained that if I resend the same request I will probably get the same denial. I sincerely feel that this is nothing more than a stall tactic on their part. They are not allowing me to dispute items on the credit report.