YES, you are responsible for anything that concerns the loan you co-signed.
In the land of litigation, anyone can sue for almost any reason. However, a lender would require insurance be carried on an auto until the loan is paid in full. Most states have insurance requirements also. The fact that he was uninsured could be a serious problem in the liability and legality arena. The transaction might be seen as fraudulent. What you knew or didn't know about this, might decide your responsibility (if any).
For the length of the contract you sign. If you cosign on a 3 yr loan, you are responsible for the debt for 3 years.
You would be responsible for the note or loan you co-signed for.
You could be held liable for the payments if the other party defaults. Your signing the contract is "insurance" for the lender that payments will be made, and they will consider you responsible if the primary party defaults.
they want your parents or another responsible adult to say they will repay the loan if you can't .
how many times can someone cosign a car
Yes.
The spouse is not responsible and should not have this on her credit. But the estate of the deceased will still be responsible for the debt.
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You will be responsible for the money.
Yes
Yes. And if he does he will become equally responsible for paying the mortgage if the primary mortgagor defaults on their mortgage payments. The bank will go after him for 100% of the debt.
If you are a minor, you cannot LEGALLY cosign or sign any loan/contractual agreement.