THE man who would be the new owner of Facebook has an offer for its current owner - come work for me.

Paul Ceglia claims Mark Zuckerberg owes him 84 per cent of the world’s biggest social networking site, courtesy of a written contract between the two that he claims was signed by Mr Zuckerberg seven years ago.

Just who will run the multi-million dollar social networking site is still to be decided by the courts, which have moved the case from a state to a federal level and frozen Facebook’s assets until the matter is settled.

Mr Ceglia claims Mr Zuckerberg offered him a 50 per cent stake in 2003 for what was then called "The Facebook" for $US1000 ($1100), plus an additional one per cent for each day the contract terms weren’t met.

The contract surfaced just weeks ago, but Mr Ceglia says that’s because he’d forgotten about it.

ABC News reports the document was found in an ancient folder gathering dust when police raided Mr Ceglia’s property while investigating him for fraud relating to his wood-pellet business.

Now details have emerged that even if Mr Ceglia wins his David vs Goliath battle against the web giant's CEO he may keep Mr Zuckerberg on as the company head.

“If at some point in the future I start running Facebook, I guess I'm going to have to hire him to keep running the company,” he told Bloomberg.

“I really don't have much interest in it.”

This is despite claiming Mr Zuckerberg was “probably one of the most difficult people that ever worked for me".

He described Mr Zuckerberg as a fantastic coder who couldn't keep a deadline, and kept on making excuses for getting his work in late.

However, neither man may end up taking control of Facebook after a third player laid claim to the social networking throne.

A company Mr Ceglia is claimed to have been contracted to when the alleged agreement was signed says Facebook would be owned by them if Mr Ceglia is successful.

CEO of Streetdelivery.com Andrew Logan described Mr Ceglia as a "real opportunist" who would "talk one way and then do something completely different".

He believes that if Mr Ceglia's contract with Mr Zuckerberg is legitimate, then another dusty old contract could give ownership to Mr Logan.

“We're going to lay claim that I own it,” he said.

“(Mr Ceglia) was under contract to me.”

But, either way, Mr Zuckerberg says it's "quite unlikely" any contract was signed and says Mr Ceglia's claims are "absurd".

Facebook lawyer Lisa Simpson has previously acknowledged that Mr Zuckerberg and Mr Ceglia had worked together on the street-mapping website but said the contract submitted by Mr Ceglia was full of "inconsistencies, undefined terms and things that don't make sense".