The California Service Bureau contacted me XXXX XXXX, 2015 to advise me of an alleged unpaid bill for {$34.00} ( Creditor " XXXX XXXX XXXX XXXX Region '' ). I responded to their XXXX XXXX, 2015 inquiry immediately asking what the charge was for, and who authorized them to attempt the collection. I called CSB and got them to provide contact information and proof of authorization. I 've now received a XXXX letter from CSB, notifying me that I have been charged interest ( {$1.00} ), I contacted the healthcare provider 's office and was given contact information for their Billing Office. The doctor 's billing office was unable to find any unpaid or past due bills relative to my name or account. CSB has not responded to my request that they provide specific information to me concerning the path of this questionable charge. To date, they have not supplied me any proof of this bill, or any proof of their legal assignment to collect alleged monies from me on behalf of their medical client.