The Office of the Data Protection Authority says a series of fake telecoms bills are being sent to islanders.
The ODPA says scammers, claiming to be from Sure, are targeting older CWGSY email accounts.
They mimic the legitimate billing template 'quite convincingly', and prompt users to click on a link to view their bill online - but this takes them to a fake payment portal or downloads malware.
Bailiwick Data Protection Commissioner Brent Homan says islanders should be vigilant and look out for friends or family who are less tech-literate.
“Email phishing attempts from fraudsters spoofing legitimate service providers are a common tactic used to steal your data and money.
“Pausing to ‘think before you click’ can help protect you against such scams.”
Sure has published guidance in response.
It says official emails will use your name, rather than generic “Sir/Madam” or “customer” greetings, and include your customer number.
German Youth Orchestra to join Guernsey's Liberation Concert
Islander creates Guernsey AI platform
Island Energy to face charges over fatal Haut du Mont explosion
Woman (78) dies following collision in Guernsey
Cost of sending a letter to the UK from Guernsey will rise by by 14%
European Travel Authorisation applications open ahead of 2 April change
Guernsey charity helps sets up schools in Kenya
Aurigny opens seasonal Guernsey to Corsica route
