A few things to check:
- Copy and paste the code to avoid typos.
- Make sure there's no trailing space after the code.
- Check that you're logged in. Some voucher codes are account-linked.
- Only one percentage voucher code per order.
Using a gift card? Enter it as a payment method, not in the voucher field.
More about using vouchers and gift cards.
Still getting an error? Send us the code and your order number.