The first part is the voucher ID, which is in the following format XXXX-0000-00 (where the X is a letter and 0 is a number) and the second part is a security code, which is a mix of numbers and letters.If you have a promotional code (usually all letters and no hyphens), do not use this page - you can use the journey planner on the Promo Codes for National Express to redeem it.