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.
Filipino festival planned for Laxey
Glen Maye requisition meeting scheduled
Viking longboat races today
Postal vote applications have to be in soon
Mum launches petition over university support
Bus services north and south face disruption later
Wildlife Trust unveils woodland plans