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”.

It depends! Normally, the percentage that you can save with that Lunchbox 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 Lunchbox. However, the store will surely give out notice if available.

All deals from Promotion Programs of Lunchbox 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.

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