You should always keep updated on your favorite stores coupon policy as it may change frequently.  Here is what Wal Mart's current coupon policy entails:

Walmart Coupon Policy

We gladly accept the following types of coupons*

• Print-at-home internet coupons
  • Must be legible
  • Must have “Manufacturer Coupon” printed on them
  • Must have a valid remit address for the manufacturer
  • Must have a valid expiration date
  • Must have a scannable bar code
  • Buy one, get one free (BOGO) coupons with a specified price
  • Are acceptable in black and white or color
  • May not be duplicated
• Manufacturers’ coupons
  • For dollar/cents off
  • For free items (except those printed off the Internet)
  • Buy one, get one free (BOGO) coupons
  • Must have “Manufacturer Coupon” printed on them
  • Must have a valid remit address for the manufacturer
  • Must have a valid expiration date
  • Must have a scannable bar code
  • May not be duplicated
• Competitors’ coupons
  • A specific item for a specified price, for example, $2.99
  • Buy one, get one free (BOGO) coupons for items with a specified price
  • Have a valid expiration date
  • Are acceptable in black and white
• Soft drink container caps
• Checkout coupons (“Catalinas”)
  • Printed at our competitors’ registers for dollar/cents off on a specific item
  • Must have “Manufacturer Coupon” with specific item requirements printed on them
  • Must have a valid remit address for the manufacturer
  • Must have a valid expiration date
  • Must have a scannable bar code
  • Are acceptable in black and white
  • May not be duplicated

We DO NOT accept the following coupons:

• Checkout coupons
  • Dollars/cents off the entire basket purchase
  • Percentage off the entire basket purchase
• Print-at-home Internet coupons that require no purchase
• Competitors’ coupons
  • Dollars/cents off at a specific retailer
  • Percentage off
  • Buy one, get one free (BOGO) coupons without a specified price
  • Double- or triple-value coupons

*The following are guidelines and limitations:

• We only accepts coupons for merchandise that we sell.
• Coupons must be presented at the time of purchase.
• Only one coupon per item.
• Item purchased must be identical to the coupon (size, quantity, brand, flavor, color, etc).
• There is no limit on the number of coupons per transaction.
• Coupons must have an expiration date and be redeemed prior to expiration.
• If coupon value exceeds the price of the item, the excess may be given to the customer as cash or applied toward the basket purchase.
• WIC or SNAP items purchased in a WIC or SNAP transaction are ineligible for cash back or application to the basket purchase.
• Great Value, Marketside, Equate, Parents Choice, and World Table coupons have no cash value and are ineligible for cash back or application to the basket purchase.
• The system will prompt for supervisor verification for:
  • 40 coupons per transaction.
  • A coupon of $20 or greater on one item
  • $50 or more in coupons in one transaction