A Chipping Norton man has pleaded guilty at the Old Bailey to defrauding Oxfam.
Edward McKenzie-Green, of The Leys, was found to have committed £64,000 of fraud by setting up false invoices for companies he had set up.
The 34-year-old was head of counter-fraud for the charity at the time of the offences, which were committed in 2011.
His barrister had argued that the offences occurred after McKenzie-Green had developed a “very serious addiction” to prescription medication and his marriage had broken down.
The BBC reports that McKenzie-Green has been released on bail and will be sentenced on 16 May.