Let us assume for the sake of argument the mortgage holder on the New Jersey property forecloses, sells the property at auction, and there is a resulting deficiency judgment. The deficiency is like any other unsecured debt and as such is legally identical to credit card debt, medical debt, or a payday loan.
See the Bills.com resource Collections Advice to understand your rights and liabilities in the situation you described if you take no action to resolve the debt.
You have options for resolving the hypothetical debt. See What Are My Debt Consolidation Options? for more information.
If the New Jersey property was your primary residence, I would suggest you review the Making Home Affordable program.
I hope this information helps you Find. Learn & Save.