A contract isn't complete until someone actually spend money (or something of value) in reliance. The standard remedy for breach of contract is to unwind the vi

A contract isn't complete until someone actually spend money (or something of value) in reliance. The standard remedy for breach of contract is to unwind the victim's situation to the position they were in before the contract was signed. So at the moment you sign the paper, but don't hand over money or burn other bridges or whatever, it is trivial to tear up the paper.