Summer visitors to the north coast have been warned of scammers cheating unsuspecting social media users.
At least 20 people have been the victims of a Facebook Marketplace scam that came to light in May.
Scammers have been using fraudulent images of legitimate holiday accommodation to get money from visitors looking for a place to stay in Donegal.
However, police are aware of a similar scam that has cost hundreds of pounds to people looking to rent in Portrush.
“The offenders, using various names, have placed ads on a Facebook Marketplace of a holiday home for which victims have booked and paid deposits of between £ 100 and £ 500,” a PSNI spokesman explained.
“They believe they are paying for a holiday rental in Donegal County, but in reality they have been scammed.
“Once the victim has transferred the funds, the scammer blocks them on social media, preventing any other communication.
“The result is that the victim stays out of his pocket and hopes of a dream getaway were shattered.”
People trying to book a getaway to Northern Ireland have also been discovered.
“Police are also aware of a similar type of scam operating online with four allegations made in connection with a fake holiday accommodation in Portrush,” a PSNI spokesman added.
“The victims have paid deposits of between £ 100 and £ 200. Similar to the Donegal scam, these victims feel nothing of the scammer once the deposits are paid.
“Once again, they have been scammed and their hopes of a coastal rupture have been dashed.”
Police encourage anyone who believes they have been the victim of any of these scams, and has not reported it, to do so now.
Scamwise NI Partnership President PSNI Superintendent Gerard Pollock issues this warning.
“As the cost of living increases and most of us are on holiday at home, it is understandable that people go in search of the best deal,” he said.
“However, what can appear like a bargain holiday on a social media platform or an online ad, is too often the start of a scam, which will cost you hundreds of pounds and leave you without that getaway.
“It may seem obvious, but take some time to do your research on the company or person you are booking with.
“Don’t just rely on a website or review. If it is a fake, there are many chances that others will write about your experience and some basic internet research will find it.
“Look for the logo, check if the company is a member of Abta, and if you book a flight, check that it is approved by Atol.
“Never pay by bank transfer: The safest way to pay is by credit card, and whenever possible, avoid paying by bank transfer to someone you don’t know or haven’t known in person. If the deal seems too good to be true., it probably is. “
If you have been the victim of a scam, report it to the police on 101, your bank immediately, online at www.actionfraud.police.uk or call 0300 123 2040.