Facebook's Filing Calls Ownership Claims Fabricated

Facebook sharpened its attack on Paul Ceglia, a New York man who says that a 2003 work-for-hire contract with Mark Zuckerberg, the company’s founder, entitles him to half of Mr. Zuckerberg’s stake. In a legal motion filed in federal court in Buffalo, Facebook provided details and expert testimony to support its claims that the contract at the center of Mr. Ceglia’s lawsuit was doctored and that a series of purported emails between the two men was fabricated.