Visa和Walmart的对战正在进行时。从10月24日开始，曼尼托巴省（Manitoba）的16家Walmart不再接受Visa信用卡付账。而加拿大的Visa也宣布，Visa信用卡持卡人在曼尼托巴省的超市一次购买$50以上的商品，
具体条款如下：TrialPay/Visa will email you confirmation of registration. Confirmation that your $10 credit is being processed will be emailed to you after your single qualifying purchase of $50 or more, incl. taxes using your enrolled Visa card at a Grocery Store located in Manitoba has been confirmed. Visa Debit cards are excluded. Once enrollment is confirmed, you must make a qualifying purchase within 15 days of enrollment. Grocery Stores include physical retail locations that sell a full line of food products and are identified in the Visa Systems by Merchant Category 5411. Excludes: convenience stores and specialty stores that sell a limited selection of food. Offer may exclude purchases on prescription drugs, alcohol, tobacco, lottery tickets and postage. Limit 1 per card. Accounts must be open and in good standing during offer and redemption periods.