Pre-purchase vouchers bought via the website will not work on the MILK Books Photo App extension, but you can buy your pre-purchase voucher directly from the extension.
You will need to open or create a project in the size, format, and range of the product you wish to order. If there is a current promotion running, there will then be a banner at the top of the screen that you can click on to buy your pre-purchase voucher.
Once you are ready to checkout, you will then be able to apply your pre-purchase voucher during the checkout process to redeem your product.
If you purchased your voucher via the MILK Books website and you are checking out via the MILK Books Photo App extension, please contact our Customer Service team here.