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”.

Surely yes, Walmart's birthday is a special occasion for customers to enjoy a bunch of great discounts, and attached are valuable gifts you can miss out on.

Normally, most of the websites you can print the grocery coupons from only work on a computer, even you can get coupon books mailed to your home for free. But it completely depends on Walmart's support program at the time you search, so please visit the Walmart site to know more details.

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

Yes, it has ever. It may not be available now, but it is completely possible for loyal customers of Walmart to get it by tracking all of its promotion programs.

All deals from Promotion Programs of Walmart 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.