The Steam Packet Company says it can only accept cash payments on vessels today.
It posted to Facebook earlier, saying it was having problems caused by worldwide IT issues.
In its post, it says all sailings on the Manxman and Manannan are affected.
Problems with software from IT giant Crowdstrike have been causing difficulties around the world today.
Great progress on Peel sewage works, says MU
How much has been spent on carbon literacy training?
Gov made no assessment before apprentice scheme changes
Government strategy to promote local food under spotlight
Local man to run famous marathon for Children's Centre
Are there supply issues at the meat plant?
What's the target patient to GP ratio?
Plans for new high school to be discussed