Do a challenge to the charge so they provide you further information.

This debt will be allocated in the divorce.

You, no, her estate, yes. But the bank accounts might not be in her estate.

They may have made an error. Check the court file and look into a motion to set aside the judgment.

There is not likely anything they can do if all assets are exempt.

It sounds like it may not be legitimate. Ask them to send you proof in writing but do not give them your address or any other information.

There is not enough information here to answer the question. Re-post another question or Consult with experienced attorneys in the state where...

It may defend on copy of what. If it is the proof of service, then no.

You may have a medical malpractice case. Consult with experienced medical malpractice attorneys in the state where this occurred. Use the Avvo...

Yes. You can be pursued for breach of contract.