I've never had this problem with my iPass. I move it from vehicle to vehicle, and adding new plates is a snap on their website. I couldn't be happier with the service. (Yes, I made a field trip to Illinois to buy an IPass when I lived in Michigan, and now use it in DC).

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.