"Mastercard users all over the world reported being unable to make online or in-person payments early Sunday morning. Hundreds of people in as many as 65 countries - including the United States, Japan, Italy and Australia - all experienced a loss in services for a brief but troubling period, according to DownDetector, a website that catalogues real-time reports of issues and outages. Mastercard told Fox Business there was a glitch affecting transactions that has since been resolved."