Asking for a friend who has no status. He is flying from the US to Finland on AA + AY. First leg is AA domestic with an AA flight number, second leg is AY transatlantic with AY flight number. He bought a Light ticket and fare rules say no free checked bags, first checked bag 70 EUR. I understand that he can pay 70 EUR at the check-in desk when checking in for the first leg. But is there any way to prepay, maybe at a cheaper price? It seems not to work on either airline's website.