A male model stopped with €570,000 cash in a bag as he prepared to board a flight from Dublin Airport to Brussels on Friday morning was questioned by revenue officials for several hours before being released.
Police at the airport swooped on the 36-year-old shortly after 7am in what they have described as "an intelligence-led operation".
In recent years the man has forged a career as a model and occasional television presenter who is well-known on the Dublin celebrity circuit.
He was under surveillance from the time he arrived at the airport yesterday morning for an outbound flight to the Belgium capital.
"There has been suspicion around this individual's activities for some time. Customs officers searched his luggage and found the large stash of cash," a source said.
Revenue officials immediately made a court application to retain the cash while they investigate whether it is the proceeds of crime.
Judge John Coughlan granted a three-month detention order for the money.
The model was questioned at the airport for several hours by Revenue officials before being released.
Revenue described it as "the largest seizure of cash to date this year".
The cash was seized under the Proceeds of Crime legislation, according to Revenue.
The largest seizure of cash last year was €168,000 at Dublin Port.