BUFFALO, N.Y. (AP) — A federal judge has again ordered a New York man who’s suing for part ownership of Facebook to turn over a letter from a previous lawyer to the social media company’s attorneys.

The judge in Buffalo also fined Paul Ceglia and his current lawyer, Dean Boland, $1,000 each for not producing the letter when told to twice before.

Facebook’s lawyers believe the so-called Kasowitz letter supports the company’s claim the contract on which Ceglia’s 2010 lawsuit is based is fake. The letter is from the law firm Kasowitz, Benson, Torres & Friedman to another law firm that once represented Ceglia.

Ceglia claims a 2003 document signed by Facebook founder Mark Zuckerberg entitles him to half-ownership of the Menlo Park, Calif.-based company.

Ceglia’s lawyer hasn’t commented on Wednesday’s ruling.

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