although enett international usa , llc -lrb- for credit or debit cards issued in the united states excluding american express -rrb- or enett international -lrb- uk -rrb- limited -lrb- for all other cards and all american express cards -rrb- take ultimate responsibility for the credit card or debit card payment , booking.com will take care of customer support in case of questions related to a reservation paid by credit card or debit card .