Revenue officers have seized some €7,000 in cash at Rosslare Europort.
The seizure was made on Thursday following routine profiling.
Revenue officers, with the assistance of detector dog Flynn, stopped and searched a vehicle that had disembarked a ferry from Cherbourg, France.
The cash is suspected to be the proceeds of, or intended for use in, criminal activity.
It has been detained by Revenue in accordance with proceeds of crime legislation.
On Friday, at a special sitting of Gorey District Court, officers were granted a three month Cash Detention Order by Judge Gerard Furlong.
A man originally from Latvia but now living in Ireland was questioned.
Investigations are ongoing.
Main image: The cash was found with the assistance of detector dog Flynn | Image: Revenue