Talk to the lender. Try to get an extension, lower interest, or reduced payment. Most lenders are in the money business and would rather not own real estate. If the value of the property has decreased, some lenders cooperate and allow a sale of the property, instead of forcing a foreclosure. If the debt is greater than the property's value, in order to sell it and turn the lender's interest into cash, the lender must agree to accept less than full payment as satisfaction of the debt.
Most people are shocked that they can lose their property and still owe taxes on the profit.
Recourse means that the borrower has personal liability for the loan, in addition to the risk of losing his real property. State Law protects borrowers from personal liability on a purchase mortgage for a home which they occupy at purchase. This law applies to properties of up to 4 units, and applies only to loans used to purchase the property. Purchase loans include bank loans and seller carrybacks. IF there is no cash paid out to the borrower, or if any cash paid out is used for property repairs or improvements.