May 19 is the deadline Visa set for financial institutions to file fraud claims related to the Heartland Payment Systems (HPY) data breach. Card issuers can recover an unspecified portion of losses connected to the breach, but they face the May 19 deadline to file their claims with Visa. To date, more than 600 banking institutions have volunteered to us that they were impacted by the breach. “Who do I talk to at MasterCard or Visa?” “How do I file a claim?” “Exactly how much detail do I have to go into each compromised account?””]