Earlier this month, Paul Ceglia made national news when he claimed that a contract signed by Facebook chief executive Mark Zuckerberg entitled him to 84 percent of Facebook. Facebook called the whole thing "frivolous". But is it?

Ceglia claims to have purchased 50 of the company for $1,000, with an additional one percent going to him for every day the site was delayed past January 1, 2004.

A little over a week later, the issue seems a little less cut and dry than the social network had originally painted it. Addressing a U.S. District Judge, a Facebook lawyer admitted that she was "unsure" that the signature on contract was, in fact, Zuckerberg. "Whether he signed this piece of paper, we're unsure at this moment," she told the judge.

The lawyer, Lisa Simpson added, however, that the company has, "serious questions" about the document. Simpson added that, "Mr. Zuckerberg did have a contract with Mr. Ceglia." Zuckerberg had worked as a coder for Ceglia, working on a project called StreetFax.

Facebook, however, suggests that the claim is too old. According to Bloomberg, Ceglia has declined to address why he claim took so long to file.