To verify discount vouchers simply add a item to your cart and proceed to the shopping basket. At this step, you should be able to see all the products you have in your basket. You will have the options to either continue shopping, update your basket to amend changes, proceed to the checkout to process your order or apply a voucher. If you have received a discount code, simply enter it at this stage, and click on apply. If the voucher is valid it will effect the subtotal amount on the cart. The last stage is to simply proceed to the checkout.