All information are public (only for themselves) and both users can restore the operation if something goes wrong. Both users are interested on cooperate and ca

All information are public (only for themselves) and both users can restore the operation if something goes wrong. Both users are interested on cooperate and can restore the operation from a web app or your application. Also, is higly unprobably that something as this happens, is an automated process with a restore system. The system can restore the operation (knows all information to do it).