Yeah, I have mine attached to a credit card. (Same one I use for my $30/month to FR. Hint.) Anyway, we went up to Maine last summer and got an email from EZ-Pass warning us that we had less than the required minimum in our account. Seems that the expiration date on the credit card had passed, even though the account had been updated with a new card and expiration date. Got home with about $7.00 bucks in the account, but if it was close. Now I check the status of the account (and added another card) before I take any trips using it. (It stays in the house except on road trips.)
You have to pay to drive up the the east coast? It’s free along the west coast.