No, unfortunately it is not possible to redeem a voucher retrospectively.
Vouchers must normally be redeemed during the order process. If you have forgotten to redeem your voucher, we cannot apply it retrospectively.
Please be sure to enter your voucher code during the checkout process to ensure the discount is applied. If you have any further questions or need assistance, please do not hesitate to contact our customer service team. We will be happy to help you.