In a short sale, the lender closes the mortgage in return for whatever sale price the homeowner can net. However, the difference is sometimes considered income for which the selling homeowner may be taxed. It's important to include a tax professional's advice in the deal.

Under the new short sale incentive, lenders can receive a $1,000 payment from the U.S. Treasury for allowing the owner to sell the house for less than the amount owed on the mortgage and for accepting the proceeds as full repayment, rather than treat it as a short sale.

Lenders can also receive $1,000 for accepting a deed-in-lieu transaction, in which the deed is simply transferred to the lender instead of going through a costly foreclosure.

Homeowners who agree to short sales or deed-in-lieu deals can receive up to $1,500 in closing costs. To help stop second mortgages from blocking the deal, the Treasury will pay second lien holders up to $1,000 to relinquish their claims in such transactions.