Cash totalling £75,000 has been seized at Holyhead port. A Vauxhall Astra coupe arriving by ferry from Dublin was stopped on July 25.
Investigations are continuing into the find and the driver, from West Yorkshire, is being given time to provide evidence of the money's origins and intended use.
“Where we suspect that cash may be linked with criminal activity, we can seize it and it will only be handed back if it is later proved to be legitimate.
"We are working hard to prevent drugs, contraband, illegal immigrants or the proceeds of crime from crossing our borders and these seizures show the robust controls we have in place.”
An inquest at Caernarfon has been opened and adjourned on two climbers whose bodies were found in the sea at the foot of cliffs near Holyhead.
They were student Jack Hutton-Potts, 23, of Petersfield in Hampshire and 48-year-old Vaughan Richard Holme of Horsham in West Sussex.
The pair had been roped together on the Gogarth cliffs which are up to 400ft tall near the North Stack at Holyhead on the north coast of Anglesey.
Friends raised the alarm on Saturday night when they failed to meet them. Three lifeboats and an RAF helicopter from the nearby Valley base took part in a major search.
The bodies were found in the sea on Sunday morning and recovered by the crew of a lifeboat.
North Wales Police have confirmed that the bodies of two men have been recovered from the sea off the Anglesey coast.
It follows major search operation for two missing climbers.
The bodies have not been formally identified, but the discovery follows a search for two climbers - a 48-year-old man from Sussex and a 21-year-old man from Hampshire, who had been climbing in the North Stack area of Holyhead yesterday.
They were reported missing around 10.15pm last night. A search operation involving RAF 22 Squadron, the Coastguard and North Wales Police was halted at 1am this morning and resumed at first light.
The bodies were located in the sea shortly after 7.15am today. The North West Wales Coroner will be informed.
A major search has taken place overnight for two climbers who went missing near Holyhead on Anglesey.
Two RNLI lifeboats went out at around 10pm last night, alongside the coastguard and a search and rescue helicopter from RAF Valley.
The search was suspended at 1.30am due to poor weather conditions and resumed at 4am this morning.
The two men are understood to be in their 50s and 20s.
People on Anglesey have been given a reminder of the age of steam today with the shipping of an ancient steam locomotive from Holyhead to Dublin
Princess was built to serve the slate quarries of North Wales. Now, she's being sent to Ireland to encourage visits between the two countries.
Ian Lang reports
The steam engine was on display in a north Wales pub until November last year, when it was put on show in London. 'Princess' will travel to Dublin by ferry from Holyhead Port later today.
The original investment in the Ffestiniog Railway was with Irish money so we thought it fitting that 'Princess' should travel to Ireland as part of The Gathering Ireland where she can be enjoyed by thousands of people at Heuston Station in Dublin.
'Princess' will be positioned at the ticket barriers so everyone who visits the station will get the chance to see her in all her glory as we have lovingly restored her to her former condition.
A 150-year-old steam engine is being shipped to Dublin to encourage more people to travel to celebrate the links between Wales and Ireland.
'Princess' will take pride of place at Heuston Station in Dublin for The Gathering Ireland festival.
The engine was built in London in 1863 and named in honour of Princess Alexandra of Denmark, who married King Edward VII when he was Prince of Wales. 'Princess' was originally built to be used in slate quarries in Blaenau Ffestiniog and was one of the world's first narrow gauge steam engines.
The Holyhead Townscape Heritage Initiative says a unique Art Deco storefront in the town centre will be restored to its 1930s glory as part of a £3 million redevelopment scheme.
Number 19, Stanley Street was unveiled as a shop before the Second World War with its rare black vitrolite coloured glass frontage.
It has lain empty for several years but is currently being refurbished with a Holyhead Townscape Heritage Initiative (THI) project to repair and encourage the reuse of many of the town centre’s historic buildings.
THI says the mid-Victorian terraced property backs onto the Roman wall of St Cybi’s Churchyard and finds have come to light as work has begun on the building.
An old butcher’s delivery bike was found in the cellar and, in a back room, an old well more than ten feet deep.
The ferry operator Stena Line - which operates out of Holyhead - says it's too early to say how many jobs will be lost in Wales follow a decision to make 200 workers redundant across Europe.
The positions under threat will be shore-based and not affect operations, says the company.
The RMT Union says around 50 staff will lose their jobs in the UK and they have been identified as clerical, call centre and managerial positions.