A method includes receiving a menu of items offered for sale by a merchant, where the menu of items permits a user, of a user device, to place an order with an attendant, associated with the merchant, that includes an item of the menu of items; receiving information associated with the order that was placed with the attendant, where the information associated with the order includes the item and a price associated with the item; receiving an instruction to pay for the order; retrieving, in response to the instruction, payment information to be used to pay the price associated with the item; sending, to a server device, the payment information to permit the server device to process the payment information to pay for the order, where the sending is performed in a manner that does not permit the attendant to access the payment information; and receiving an indication that the payment information was processed.