They can report an unpaid debt from an uninsured car accident and the state may suspend your license.

As their a judgment against you, if they will not work with you, to avoid garnishment, you may need to file bankruptcy.

You cannot unless the debtor agrees to sign the document. Otherwise, you must sue and get a judgment.

If they already sued and obtained a judgment their time continues to be able to collect until expiration. If they have not, consult with...

A homestead is for, only, the primary residence.

It depends on when you made the last payment. Search online for the statute of limitations for breach of a written contract.

It may be a scam. Whenever one is unsure, give no information, demand proof in writing (do not give your address or other information),...

Reporting it stolen is improper. If you have proper lien papers, you can do the repossession process. Or you can sue.

If the obtained a judgment, look into a motion to set aside the judgment for failure to lawfully serve the lawsuit.

No it is not their responsibility unless they arranged for the shipment. Their threats may have been unlawful.