Gardai are investigating a 2 million euro money laundering investigation involving fraud by so-called money mules.
Young people in particular are being warned to watch out for it.
A money mule is someone who transfers money illegally on behalf of other people - even if they don't know a crime's being committed.
This investigation involves around 200 "money mule" accounts across the country where transactions ranging between 5 and 35 thosand euro have been made.
Investigations are continuing and no arrests have been made yet.
Gardai say criminals are recruiting young people to help launder money because they're seen as easy targets.
A survey by Fraud Smart has found nearly half of 18 to 24 year olds are likely or very likely to transfer money for someone else in return for keeping some of the proceeds.
Gardai are launching an awareness campaign encouraging students in particular to never let their bank account be used by someone else.
