AA Smartfuel discounts must be redeemed by the end of the following calendar month e.g. a fuel discount dated 1 through 31 March will expire on 30 April.
You can redeem your accumulated AA Smartfuel discounts once on up to 50 litres of fuel. Keep in mind that your account balance will return to zero after each redemption, so it pays to fuel up with as close to 50 litres as you can to maximise your savings.