If you believe you have been improperly charged a penalty or late fee, or there are other problems with the servicing of your loan, contact your servicer in writing. Be sure to include your account number and explain why you believe your account is incorrect.
Within 20 business days of receiving your inquiry, the servicer must send you a written response acknowledging your inquiry. Within 60 business days, the servicer must either correct your account or determine it is accurate.
The servicer must send you a written notice of what action it took and why.
Do not subtract any disputed amount from your mortgage payment. Many mortgage servicers will refuse to accept what they consider to be partial payments. They may return the check and charge a late fee, or declare the mortgage is in default and start foreclosure proceedings.