Former Labour minister Denis MacShane has admitted false accounting by putting in fake receipts for £12,900 of "research and translation" services at the Old Bailey.
He used the money to fund trips to Europe, including to judge a literary competition in Paris.
Asked to enter a plea to the charge in a hearing at the Old Bailey, MacShane replied: "Guilty."
Mr Justice Sweeney told the former MP, that "all sentencing options remain open".
More top news
Outbreaks of rain and strengthening winds will affect southernmost parts of England and Wales today.
An earlier debate on the issue was suspended as an 'expression of support' following the Westminster terror attack.
Five people were killed and dozens more were injured after a car and knife attack in the capital on Wednesday afternoon.