Some Visa card payments are failing in the UK and elsewhere in Europe, the company confirmed.
The firm said this afternoon it is investigating what has caused the disruption across the continent, according to the Daily Mail.
The extent of the disruption is currently unclear but customers have been complaining on Twitter about denied payments.
Visa News Europe Tweeted at about 5pm: "We are currently experiencing a service disruption which is preventing some Visa transactions in Europe from being processed. We are investigating the cause and working as quickly as possible to resolve the situation. We will keep you updated."
The firm believes people are still able to use the same cards to take cash out of machines as an alternative method of payment.