Men and women caught up in romance fraud were scammed of over € 1 million last year.
Gardaí say 75 cases were reported in 2019, including one case where a woman lost € 62,000 after she struck up a relationship with a man online.
Separately a man who met a woman in an online chat room sent her € 50,000.
Romance fraud involves online dating sites used by fraudsters who develop relationships with victims using fake ID, photos and life stories.
Speaking to Ocean FM, Detective Chief Superintendent Pat Lordan spoke about the warning signs people should look for when it comes to online dating: