I have yet to see a loan modification that has a reduction of loan principle. (joeniece.com)
Hmm, interesting... Maybe a value of the 15 year loan principle is to get the buyer to purchase less home in the first place. (allfinancialmatters.com)
So even if the home falls in value, or if you stay there long enough that the accumulated loan principle, interest and fees exceed what the home is worth, you or your heirs can never be required to repay more than what the home can sell for when you vacate it. (mortgageloan.com)