hyatt hotels corp h.n say thursday discover unauthorized access payment card information certain hyatt-managed locations worldwide march 18 2017 july 2017. hyatt say incident affect payment card information cardholder name card number expiration date internal verification code card manually enter swipe front desk certain hyatt-managed locations bit.ly/2yhbsfr owner andaz park hyatt grand hyatt chain hotels say total 41 properties affect 11 countries china account 18 properties among impact countries seven hyatt properties affect u.s. locations include three hawaii three puerto rico one guam chicago illinois-based company say cyber security team discover sign unauthorized access july launch internal investigation complete thursday resolve issue take step prevent happen future first time hyatt face data breach problem hotels late 2015 hyatt say payment process system infect credit-card-stealing malware affect 250 hotels 50 countries hyatt hotels discover card data breach 41 properties