What is my e-TAG number?
Your e-TAG number is a 10 or 12-digit serial number printed on your e-TAG device. It uniquely identifies your particular e-TAG.
Log into your account to find a listing of all your e-TAG numbers. They’re listed on the account overview screen, along with your account balance.
You need your e-TAG number to transfer (and charge) a toll notice to your e-TAG account.