A filing has been submitted to a U.S. District Court in Buffalo New York, signed by Facebook CEO Mark Zuckerberg, indicating that he did not sign the contract presented by Paul Ceglia, who says he is entitled to a big chunk of Facebook.

The filing is actually a “Declaration of Mark Elliot Zuckerberg in Support of Defendants’ Motion for Expedited Discovery”. Zuckerberg says that he did sign a contract, but the one presented by Ceglia is not it. In the filing, Zuckerberg says, “I understand that Plaintiff Paul Ceglia alleges that Exhibit A is an agreement that entitles him to partial ownership of Facebook, and that he and I signed this document on April 28, 2003.”

“I did not sign the document attached as Exhibit A to the Amended Complaint,” he says. He also says he didn’t receive any such emails as previously presented.

Here is the document (hat tip to AllFacebook):

Facebook’s defense is essentially that Ceglia altered a contract and made up emails. The company also hired private investigators, which have apparently found that he was also involved with land scams, adding to other criminal behavior in Ceglia’s past.