Real estate license to the bank mortgage loan. There are mortgagor and borrower. The bank asks the borrower to pay back the money first, and then asks the mortgagor to pay back the money. If they don't pay back the money, they will be blacklisted and then bring a lawsuit to the court. After the court accepts the case, they will inform you to pay back the money, otherwise they will freeze the bank deposits and draw the money away directly. If there is no deposit, they will seal up the mortgaged property, enter the auction procedure, settle the legal fees first, and then. !

In short, if your ex-husband doesn't pay it back, you will pay it back, or you will sell the house! But you can go to court to sue your ex-husband afterwards.

Specific matters, you can consult a professional lawyer.