Don't know about the EZpass system but could be typical of how UPS operates and this is not a jab, just what I observe.
UPS used to have a good repoire with many, if not all, vendors up and down the highways. The last ten or more years, we as drivers have seen many, again, if not most, of them demand cash or valid credit cards from the company for tires, repair work, road calls. Why?
Well, many have said the company just won't pay. If they do, it takes 6 or more months to get their $. Many of these road shops are a one-person operation and can't function like that, waiting for their money. I have been refused road service from more than one vendor for this reason.
Could it be that UPS just isn't paying the EZpass? Or not paying on time? Dunno.
Now, when I get an overweight ticket, I make a copy of it for my own, turn it in and ask every week if it's been paid. Once/if it is, I then ask for a copy of the payment receipt. We've had some drivers pulled in the scales and arrested for non-payment of overweights, which is the companys responsibility. By the way, if you get arrested, you're on the clock the whole time. Sweet, huh? But, be careful, because some states will ding you on your license even tho it's not a moving violation. I know a UPS Freight driver that had to fight to get THAT off.
Again, this is not badmouthing the company, but my impression is that they STILL think they're so big and are the only game in town that everyone has to wait for THEM to act or get paid, at THEIR own time frame.