Question about assignment guarantee of fee

[Jeff Wells]

We are wholesaling a property to someone we've never dealt with or met. In the contract we have that we get our fee regardless of whether he closes the deal. He says he isn't comfortable with that because anything could happen. Yes anything could happen. But to protect ourselves we think we need to guarantee payment so he can't kill the deal, then go back and get from the current owner a cheaper price. I realize this is a pessimistic view but honestly, people in general have rightfully earned my pessimism. So what do you think? Let it ride and hope he's honest or risk pissing him off and losing the deal? What's the norm?