Australian television legend Reg Grundy is firming as the likely person behind a mysterious $200,000 donation to the Free Enterprise Foundation, an entity closely linked to the Liberal and National parties.

The donation was made last financial year by a company called Akira Investments Ltd, whose mailing address was listed with election funding authorities as the luxury Les Caravelles building overlooking Monte Carlo's famous harbour, Port Hercules.

In recent years Akira Investments has been linked to two of Mr Grundy's major assets - a luxury super yacht and a private jet.

The 90-year-old Mr Grundy, worth an estimated $800 million, lives in Shell Point Road, Tuckers Town, in Bermuda. He made his fortune producing some of the nation's best known television shows such as Neighbours, Wheel of Fortune, Sale of the Century and Prisoner.