Jet2 has issued a customer warning to people who have booked flights with the airline.
It released a statement on its Twitter page, warning travellers of scam messages.
Some people who have booked flights with Jet2 have received a message asking them to get in touch with the carrier.
It urged holidaymakers not to hand over any personal information, the Liverpool Echo reports.
Jet2's Tweet reads: "URGENT CUSTOMER NOTICE.
"We have been made aware of several customers receiving messages advising to contact @jet2helps.com (and/or similar) to discuss bookings and queries.
"These accounts are NOT affiliated to us, so please DO NOT give personal information to them.
"The only official account for http://Jet2.com and Jet2holidays on Twitter is @jet2tweets which is a verified ‘blue tick’ account."
More people are booking holidays with Jet2 and other operators following a major travel update.
Transport Secretary Grant Shapps announced last week that the traffic light system is to be replaced from October 4 by a single, reduced, "red list" of destinations, from where travellers arriving in England will have to quarantine in a Government-supervised hotel.
People who are fully vaccinated will no longer need a pre-departure test before returning from non-red list destinations, and from the end of October they will be able to replace the day two PCR test with a cheaper lateral flow test.
He said Turkey is proving "exceptionally popular", adding: "Thanks to the certainty that yesterday's announcement has given customers, destinations right across the board are selling well, whether it's for late summer sun, winter or next summer.
"As you might expect, half term dates have also seen a surge in bookings for families."
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