What contract should I have in place?

[Christopher Hunter]

What contract do I have in place to protect my position? I have my first buyer in place and he gave me his criteria for the type of investment property he is looking for. Is there a contract to use not to get circumvented out of a deal? He asked ask that I found some properties that meet his criteria and send them over to his assistant and she will email over the proof of funds letter to the selling party.