Question about Ezpass

In an interesting turn of events, I just found out that the car I have doesn't have an ezpass. Can I use my own or does the system automatically charge based on the plates? In the NY/NJ area.

Edit: confirmed with host that they don't have anything setup; ezpass or autobill. I have my own ezpass and informed them that I would be using it; they agreed. Any tips to not get double billed? I'm only anticipating like $25 in tolls but still.