In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Normally, Coursera will make it easy to use online coupons with scannable barcodes, such as 55% off your entire purchase, in-store. ... You can check your Coursera digital coupons to use In-Store.

Simply, access the Coursera site and find your coupons bar. All the latest

coupons will be shown out, note that the coupons bar will only appear when you have coupons available.

Normally, one discount code is only applied for one offer. However, If the users put a vast of items in their cart, it is easy to use one coupon code to purchase items. It depends on Coursera's policy, you can contact Coursera via mail for your reference.

Most Big Discount Events of the year witnessed a vast number of coupons from Coursera released. Especially, on federal holidays such as New Year’s Sale, Thanksgiving, Christmas... or on other important days such as Valentine’s Day, Easter, and Father’s Day..., customers also can buy at Coursera with numerous coupons.

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