All you need for a bill of sale is a simple sentence saying on x date I xxx, sale vehicle xxx, with vin number xxx to xxx person. Then write the driver's license of both parties and sign. A lawyer is extreme overkill for such a simple transaction.

By the same logic, a hallucinating LLM is also overkill versus just doing the simple task yourself and not needlessly adding risk to it.

The point still remains: let's see what the LLM delivered that the user actually used.

> All you need for a bill of sale is a simple sentence saying on x date I xxx, sale vehicle xxx, with vin number xxx to xxx person.

If you know this, you don't need GPT.

If you don't know this, you don't have a way to assess GPT's attempts at a contract. A bill of sale is indeed simple, but there's a lot of more subtle legal issues someone might run into in life.