So maybe paying with your cellphone isn't for you. That's ok. No really it is. Just don't go and try to pass off a bad check because JustChex will totally bust you on it. They offer a service called chexmessaging that lets subscribers use text messaging to send the routing and account numbers on a check through a whole bunch of databases which then spits back a simple yes or no answer to whether or not it'll bounce or not. Of course it does mean it'll no longer be safe to engage in the time-honored practice of paying with a check to give yourself a few extra days to come up with the money. Not that we've ever engaged in such behavior.