A couple from Northampton say they are “lost for words” after being told that they will be extradited to the United States on Thursday.
Paul and Sandra Dunham lost a High Court battle last month to block their extradition.
The police have now told them to report to Belgravia Police Station in London by 10am on Thursday.
From there they will be taken to Heathrow Airport, and handed to US extradition marshals.
58-year-old Mr Dunham was Chief Executive and President of a US electronics company.
He has been indicted on 13 counts of fraud and money laundering by an American grand jury.
Mrs Dunham faces eight counts. The couple “vehemently deny” the allegations.
Today the Dunhams told ITV News Anglia that they were fully expecting a phone call at some point to set a date for the extradition, but that they thought they would be given a few weeks to prepare for their departure.
They say that the police have recommended that they travel to London with nothing more “than the clothes they are wearing”, as they will not be allowed to take any personal effects abroad.
The Dunhams do not know where they will be taken in the United States, but they do not believe that they will be given bail.
They say they could be held in separate prisons for up to two years while awaiting trial.
Their local MP Andrea Leadsom has contacted the Home Office on the Dunhams behalf, but the Home Office say they are unable to intervene.
Click below to watch a report by ITV News Anglia's Olivia Paterson