The HAMP program doesn't have anything to do with what the lender can use your payments for. That is entirely controlled by the terms of the promissory note and deed of trust. Generally, these contracts provide that payments will first be applied to outstanding late fees and then to regular payments. Don't ever believe what an employee of your lender tells you unless they put it in writing.
Answered on Jan 07th, 2014 at 1:35 PM