The contract presented by Paul Ceglia, who claims he paid Zuck to build Facebook, was forged, according to a forensic report(PDF) by Stroz Friedberg. Wired's David Kravetz: "The metadata shows they were backdated to 2003 when Zuckerberg, as a Harvard University student, agreed to perform the contracted work for Ceglia. But the copies of the contract were created in 2011."
Facebook entered into evidence what it says is the original contract between founder Mark Zuckerberg and Paul Ceglia, who is suing the company for part-ownership. Unlike the version produced by Ceglia, identifying him as part-owner of "The Face Book", this version has no mention of the company at all. The "original" coding contract was recovered from Ceglia's own computer by forensic specialists; Facebook says he tried to keep it out of the lawsuit by claiming attorney-client privilege. [Wired]