Discount codes don't stack. If you have 53% off discount, they can't also use a "free shipping" coupon since Only one discount at a time can apply to a single order at the Kinko site.

Usually, Coupon Stacking is not allowed at Kinko. However, the store will surely give out notice if available.

All deals from Promotion Programs of Kinko are collected here. For each certain occasion, its coupons will be on the top of the coupon list, and surely they always come with an expiry date.

At the time of updating, Kinko has not applied Student Discount all year round yet. Check the official store and reach out to the customer support team to be clear.