Where to get a purchase agreement contract
So I’m researching and learning more about real estate wholesaling, and I’ve been getting some leads off Zillow… and looking for foreclosure houses to cold call and my main concern is if I were to get a yes deal how would i go about the contract? Where can I get a purchase agreement contract to hand over and get signed whether it is in person or on docu sign. I can’t seem to find out how anywhere. Some help would be greatly appreciated and I’m in Arizona if that matters for the contract.