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”.

Simply, access the Restaurant manager 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.

It depends! Normally, the percentage that you can save with that Restaurant manager Coupon will be shown right on the page, so you can see if it is applied sitewide or not. However, once you are not sure, try it right on their's products you want to buy.

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

Yes. Coupons for each Discount Event of Restaurant manager will be collected here while being updated day by day. Sometimes, there will be deals not updated promptly but it's rare, we expect sympathy from you. 

Yes. Like all other stores, Restaurant manager offers a number of Cyber Monday Coupons. Don't forget to check the expiry date before making your purchase.