Consult with experienced family law attorneys in the state where this occurred. Use the Avvo search tool to find an attorney....

Have the papers reviewed by an experienced real estate attorney. Use the Avvo search tool to find an attorney. https://www.avvo.com/find-a-lawyer

Consult with experienced unlawful detainer attorneys in the state where this occurred.

She would have to file with the court and prove her case.

They can sue but the SSI is exempt from collection.

It may be illegal and you may be able to sue. Consult with experienced debt collection defense attorneys in the state where this occurred.

You need a solid written agreement with a security interest. Consult with experienced attorneys in your state.

They may be in violation of law. Consult with experienced debt collection defense attorneys in the state where this occurred. Use the Avvo search...

Your ex would need to refinance and have the loan in his name only. This would likely be rejected as long as your name is in the deed. Consult...

Put your specific requests in writing and deliver the request by fax and certified mail return receipt. Demand the cease and desist. If they fail...