Dan Ariely, Professor of Psychology and Behavioral Economics at Duke University, writes about honesty:
“One percent of people will always be honest and never steal,” the locksmith said. “Another one percent will always be dishonest and always try to pick your lock and steal your television. And the rest will be honest as long as the conditions are right – but if they are tempted enough, they’ll be dishonest too. Locks won’t protect you from the thieves, who can get in your house if they really want to. They will only protect you from the mostly honest people who might be tempted to try your door if it had no lock”.”
Similarly, escrow, documentation, records, photos, will protect you from mostly honest people who might be tempted, or frustrated, or angry, or challenged, or…. Maybe even more importantly, it will protect you from your own temptations. It makes both parties more accountable for their behaviors, performance, expectations and claims.