If you have a discount voucher, it will be applicable on your next order.  All you have to do is fill in the code of the discount voucher in the « VOUCHER CODES » field when confirming your order.  In order to avoid errors in typing the discount codes (upper/lower/case/numbers), we advise you to copy/paste them from the email in which they were sent to you.  Every voucher is usable only once and remains valid for 6 months. Once the code is inserted, select OK. The amount of the discount is automatically deducted from your order.