• Visa Inc.’s Canadian unit posted an “open letter” in Canadian newspapers Thursday to protest Wal-Mart Stores Inc.’s plan to stop accepting Visa cards in its 400 Canadian stores beginning July 18 because of allegedly high acceptance costs. “Wal-Mart has initiated a public flight—something we never wanted—as they are using …

• The Home Depot Inc. filed a federal antitrust lawsuit against Visa Inc. and MasterCard Inc. for alleged lax security practices and a preference for higher-margin signature authentication with EMV chip credit cards over more secure PIN authentication, according to the Associated Press. A MasterCard spokesperson told the AP that …

• Merchant processor Square Inc. settled a lawsuit filed by a Washington University professor, Robert E. Morley, who said he invented Square’s card reader for smart phones. Terms of the settlement were not disclosed, but Square set aside $50 million in the first quarter to cover legal expenses from the …

• Payments veteran Michael J. Schwartz was appointed interim chief executive of mobile-payments and -marketing firm Spindle Inc. upon founding chief executive Bill Clark’s resignation. Schwartz comes to the company from Fiserv Inc. Clark had been CEO since 2011. • Processor Total System Services Inc. (TSYS) purchased the 45% stake …

• ATM deployer Cardtronics Inc. reached a new agreement with the Chicago Transit Authority under which it will place almost 40 new ATMs at CTA passenger stations, replacing machines already at those stations, and install more machines at additional stations. The move, which expands on an agreement reached with the …

• A bill by U.S. Rep. Jeb Hensarling, R-Texas, to replace 2010’s Dodd-Frank Act” would hurt consumers and Main Street businesses,” the Merchants Payments Coalition said, because the measure would do away with the financial reform law’s Durbin Amendment that regulates debit card interchange and sets debit card transaction-routing requirements. …

• The ATM Industry Association teamed up with media and conference firm Reconnaissance International to organize a series of international events under the “ATM & Cash Innovation” moniker. • Vantiv Integrated Payments, a Vantiv Inc. company, began the next phase of its Security Pays program to encourage business owners to …

• Visa Inc. said the European Commission, the competition authority of the European Union, approved its planned acquisition of bank card association Visa Europe Ltd.; the $23-billion-plus deal has now received all regulatory approvals, and Visa Inc. expects it to close by June 30. • Visa debuted a payment ring for Team …

• Merchant processor iPayment Inc. has agreed to promote acceptance of Samsung Electronics Co. Ltd.’s Samsung Pay mobile-payments service to merchants and resellers. Merchants can receive a merchant kit that includes window decals and other point-of-purchase items promoting Samsung Pay acceptance. Samsung announced its Samsung Pay reseller program in January. …

• PayPal Holdings Inc. plans to cease operations in Turkey in the next week because financial regulators there rejected its license applications, apparently because it does not keep its IT systems in Turkey, Fortune reported. • Some 88% of 400 respondents to a RemoteDepositCapture.com poll about risk said the benefits …