France - Sporadic rejection of card at French road toll stations

It seems my Mondo card sometimes gets rejected at various toll booths on the French autoroutes. I can’t see a pattern other than it’s always the same booths and i think when the amounts are higher (in the €30 range). I’m not sure on what grounds they’re rejecting it, my phone is with me and roaming enabled and i have more than enough to cover the amount.

I can give more details about the exact locations if required.

Cheers!
Lee.

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11 posts were merged into an existing topic: France Paris - Mondo worked great in Paris this weekend