verna the I pass works like this and I use the I pass ill not the Indiana I zoom I pass works in more states
its all dune through your credit card
when u get your I pass they put 50$ in your account witch they use as u go through the toll system. when u get down to a set amount
they hit your card up for another 50$
I have had my I pass for 10 years and have not made a mistake as of yet
on the I pass and you never see a bill just a invoice on your toll use
Dan