The goods were found during the search of a van on Saturday
Cigarettes and alcohol worth an estimated €8,700 have been seized at Dublin Port.
Revenue says the operation took place on Saturday.
The items - 445 litres of alcohol and 2,680 cigarettes - were seized from a van which had arrived on a ferry from Holyhead.
The van is said to have been driven by an Irish resident, Romanian national.
It is estimated the undeclared goods had a retail value of €8,700, and represented a potential loss to the Exchequer of around €5,100.
Revenue says the search was part of an "ongoing operation targeting the supply and sale of illicit alcohol and tobacco in the shadow economy".