Yes, you are still liable for any remaining balance due on the mortgage after the foreclosure sale. The mortgage is a contract: you obligated yourself to pay a certain amount. Foreclosure is one way the lender can try to get their money if you default, but it's only a mechanism to get paid: it does not eliminate your obligation. If you the home sells at the auction for less (after paying the costs of the auction first, which come off the top) than the remaining balance, you are still liable--and the lender can still sue you for--the difference between the amount owed and what they realized via the auction. Where you lived is irrelevant to the issue of what you owed.