The 83-year-old is set to officially lose the honour, which he was awarded in 2012 for services to broadcasting and charity, later today, sources said.
An independent forfeiture committee decides whether recipients should lose honours if they have brought the system into disrepute. Their decision is then announced in the London Gazette.
Former It's A Knockout presenter Hall is currently serving a 30-month jail term after finally admitting offences of indecent assault relating to 13 victims.
He had previously publicly declared his innocence.