Yes you can sue, or if they sue show the payments as your defense.

An error such as that would not invalidate the loan.

Consult with experienced civil litigation attorneys in the state where this occurred.

Your action would not be with the lender but with the seller. If the vehicle was not bought “as is” you may have a case. Consult with experienced...

A intervivos revocable trust (a living trust) should have no effect on a loan other than it may require deeds out of and back into the trust. But...

Probably not but it could be a crime. Consult with experienced criminal defense attorneys in the state where this occurred.

Not unless the borrower agrees and will sign the proper papers.

More facts are needed to provide good responses. Please re-post your question with additional information.

You do have recourse, you can sue. The gift letter will be brought up but you will show the payments. It will look bad that there was...

If the fee agreement was not determined before the legal work, the attorney can then request a fee agreement and withdraw if you do not agree.