Why did I receive a new transponder with instructions to return my old one?
407 ETR does periodic checks to determine if a transponder requires an exchange. If your transponder is selected to be exchanged, you will receive a new transponder in the mail with instructions on how to return the old transponder free of charge. We also recommend that you log in to your web account regularly. If your transponder is nearing the end of it's life expectancy, you will be alerted to exchange it for a new one.