Walmart's coupon policy can be found here
I love Walmarts coupon policy
all manufacturer coupons
all store coupons with specific pricing
all catalinas with a remittance address
There is no limit to the amount of coupons and they are taken at face value.
You can use a BOGO coupon with a BOGO sale to get both items free
All coupon overage is applied to the transaction upto and including cash back!
Any coupon use more than $20 on an individual coupon, 40 individual coupons or a total of $50 savings in coupons/price match will ask for a supervisor override.