The Island's telecoms regulator says it's issuing new guidance to companies to stop fraudsters using fake phone numbers.
The Communications and Utilities Regulatory Authority has been investigating potential problems with Calling Line Identification - the number that appears on your phone when someone calls you.
It 's concerned conmen are using fake numbers which aren't made clear to consumers.
After holding a consultation, it says it'll put a new condition on licences for business from next year to make sure they're tackling the issue.
Commissioners say “pick up your pooch’s poop!”
Historic Manx one-pound notes up for auction
Is the Island ready for 100,000 people?
Set your alarms! Young Farmers Concert tickets on sale this weekend
Treasury Minister says a tax threshold rise could cost £2.5m
Snow shuts the Mountain Road
Stop putting knives in recycling, says council
Bee Gees to release limited-edition box set