Crime boss Terry Adams has lodged notice of appeal against his seven-year jail sentence for money laundering.
Adams, 52, from Barnet, north London, pleaded guilty to conspiracy to launder his income from crime.
He was sentenced in March after the Old Bailey heard he made so much money from crime he was able to retire at 35.
His lawyers will argue that the sentence was "manifestly excessive" considering his guilty plea and not enough credit was given for his plea.
Life of luxury
Adams, who was said to be worth £11m, was also ordered to pay £750,000 compensation for the £1m he laundered.
The Crown has accepted that the money, although generated from crime, was not the proceeds of drugs, said lawyer Richard Mallett.
Mr Mallett said the prosecution also accepted that he had not been involved in organised crime since 1993.
The court heard that Adams placed illicit money with various people and used it to live a life of luxury.
From June 1997 to February 1999, an undercover listening operation was mounted by MI5 at his then home in Finchley.