Ibooked a flight from Buenos Aires to Puerto Iguazú, Argentina, for my family. I bought the tickets on Flybondi, an Argentine low-fare airline, through FlightHub. Despite carefully entering our flight details, the airline said our passport numbers were random characters. We had to buy new tickets for $1,114 on Flybondi.

FlightHub blamed the airline, but Flybondi confirmed FlightHub entered fake passport data. FlightHub has refused to give us a refund, claiming the tickets are nonrefundable. How can I get FlightHub to take responsibility for this costly error? — Emily Day, Brookline, Massachusetts

FlightHub should have ensured its system accurately transmitted your passport information to Flybondi. Under U.S. Department of Transportation guidelines, ticket agents must provide complete and

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