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@KalenXI @gentlegardener @Natasha_Jay (I know for a fact that *some* of the details have changed in the interim - you now need to complete an ESTA before entering the US from Canada by land or sea, whereas at the time we just walked up to the CBP checkpoint at the station in Vancouver BC before boarding the train. But I suspect she's run afoul of an edge case in the rules that broadly resembles the above. And at least in the US, enforcement has clearly been ratcheted up a few notches.)