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All Thalys tickets are nominative, but we authorize their resale on PasseTonBillet because the ticket checks are carried out by the ticket inspector using an automatic scanner before boarding the train and identity checks are almost never carried out.

It can however exceptionally happen that the identity check is carried out. In the event that a buyer is checked, he will have to buy another ticket, it is up to the buyer to assume the risk. The buyer will not be reimbursed.
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