When entering into a contract, I would dissuade one from relying on a verbal agreement. A contract is similar to meeting minutes if it’s not written in the contract, it did not happen. I’ve seen countless situations where people relied on someone’s word and were burned by it. There used to be a time when you shook hands with someone, looked them in their eyes and gave them your word something would happen and their word was reliable. That doesn’t happen as much now. Get everything in writing so that someone’s “selective memory” can’t harm you in the long run.