Paul Ceglia, the man who claims he has a contract that entitles him to a half ownership in Facebook, is again changing legal representation in his lawsuit against the social-networking giant and its co-founder, Mark Zuckerberg.

Ceglia filed a motion today in U.S. District Court in Buffalo, N.Y., to delay proceedings for three weeks while he finds new legal representation after allowing Jeffrey Lake to withdraw from the case.

Ceglia is in the “final stages of obtaining new counsel,” the filing said. Co-counsel Paul Argentieri will remain on the case, according to the filing.

Lake, who took on the case in June, did not immediately respond to a request for comment, and Ceglia has reportedly relocated his family to Ireland as a result of the attention the case has attracted and could not be reached for comment.

Ceglia claimed in a lawsuit filed last year against Facebook and its CEO that Zuckerberg entered into a contract with Ceglia in 2003 to design and develop the Web site that would ultimately become Facebook–a company now with an estimated value of more than $70 billion.MORE