There are two types of vouchers you can use on Lazada:
1. Code voucher
You may use a code voucher at your Checkout page. Enter your code after Checkout at the space provided before you ‘Place Order’ and the amount will be reflected at the total payment amount.
2. Collectible voucher
After you have collected your collectible vouchers, it will be automatically reflected at your Checkout page if you have met the voucher’s Terms and Conditions (e.g. validity & minimum spend)
You may refer to this link if you are unable to use your vouchers.