We didn't renew our vehicle registration before it expired. So we are waiting for it to come in the mail after renewing online, but then we get email reply that says we can drive the car before it comes in the mail, as long as we print out the email and carry it in the car.
We have no printer, and no fax machine.
My wife's mother is flying in tonight, so we sent the email to her to print and bring with her on the plane.
Technology is really weird.