The settlement was weak, so they opted to preserve their right to sue. "The Home Depot lawsuit comes a month after Wal-Mart sued Visa for the right to choose h

The settlement was weak, so they opted to preserve their right to sue. "The Home Depot lawsuit comes a month after Wal-Mart sued Visa for the right to choose how customers authorize debit-card purchases. The retailer wants customers to use a PIN, but Visa requires that shoppers can have the choice between a PIN and a signature." http://www.wsj.com/articles/home-depot-u-s-credit-card-firms-slow-to-upgrade-security-1466000734 http://www.wsj.com/articles/home-depot-u-s-credit-card-firms...