So true. And I'll add, no matter how trustworthy you believe the other party to be based on reptutation, relationships, or otherwise-- they should understand requiring assurances. The worst backstabs are from the people you know and who should know better. And a lot of people will justify it to themselves if they get in trouble. They will continue telling themselves that they are fundamentally good people and it just didn't work out as they rip you off for a lot of money. If they say the equivalent of "why don't you trust me?" that's a red flag.