If redeemed at www.delta.com, a maximum of three forms of payment (including eGifts or Cards) can be applied towards a single transaction, regardless of the number of tickets purchased as part of that transaction; if redeemed through any other method, a maximum of three forms of payment (including eGifts or Cards) can be applied toward a single ticket. eGifts and Cards can be used with other eGifts and/or Cards, but cannot be used in conjunction with any other certificate, voucher or credit towards a single ticket.