A U. S. federal appeals court ruled in favor of Facebook CEO & founder Mark Zuckerberg in a suit filed by the Winklevoss brothers, but Zuckerberg’s troubles are not yet over.

New York businessman Paul Ceglia has filed new documents in the court including a series of e-mails allegedly from Zuckerberg to support his claim that he is entitled to 50 per cent of the world’s most popular social-networking platform.

Paul Ceglia claims that he had hired Zuckerberg on Craigslist back in 2003. Ceglia says that he had invested $1,000 in Facebook at that time, which entitles him to 50 per cent, and now 84 per cent, of Facebook that is currently valued at more than $50 billion.

One of the emails (allegedly from Zuckerberg to Ceglia) submitted by Ceglia to support his claim, states, "I am really sorry I behaved as I did. Please give me your address and I will mail you back the $2,000 for your trouble, more if it will repair our business relationship.”

But, Facebook has adamantly denied the validity of the emails, pointing to Ceglia’s history of fraud.

Orin Snyder, a lawyer for Facebook, described the case as the “fraudulent lawsuit brought by a convicted felon,” and said they would defend their case strongly in court.