Paul Ceglia claims that he owns a 50 percent stake in Facebook as part of a long-running court case, from previously working with Mark Zuckerberg while the latter was at Harvard University. Ceglia's case says e-mails from 2003 and 2004 show him being involved in the launch of thefacebook.com.

However, Zuckerberg's legal team claims that the "Work for Hire" documents shared between Ceglia and Zuckerberg in 2004 "are forged." Evidence cited is the two-year-old ink, the fake aging of documents and incorrect zone times.

Ceglia "baked" the documents to give them an "aged look," Mashable says. The forensics team from Facebook found the documents were exposed to light, by hanging them from pegs, to look older. The ink was actually less than two years old.

Ceglia's e-mails include an incorrect time zone stamp of -0400 rather than -0500. Eastern Daylight Time - the former - was "not in effect" between Oct 26, 2003 and April 4, 2004, when the documents were apparently sent.

In Ceglia's 2010 lawsuit he claimed "that a 2003 contract he ... and Mark Zuckerberg signed entitled Ceglia to 50 percent of Facebook," The Washington Post reports. Zuckerberg worked for Ceglia for his now defunct company, StreetFax, doing coding work. Ceglia claims the 50 percent stake - in exchange for $1,000 of start-up funding - came along with "an extra 1 percent for every day Facebook was not online past January 1, 2004," PCMag states.

However, Zuckerberg said Facebook wasn't even existing at the time. Zuckerberg's lawyers said Ceglia altered the original contract, inserting references to Facebook.

Facebook isn't mentioned in the e-mails relating to the work Zuckerberg did for StreetFax.

The e-mails also have formatting differences, from the number of spaces after colons to the inconsistent abbreviation of Tuesday. Ceglia said the e-mails were copied-and-pasted.

"[M]ultiple reinstallations" of Windows "during the pendency of this litigation on the computer that contained the StreetFax contract" took place, the findings say. The system clock was also reset to 2003 and 2004 to try and add legitimacy. In February 2011 files were "deleted and overwritten."

"Ceglia had used and destroyed external storage devices ... which he never turned over to Facebook," The Washington Post reveals.

The "Work for Hire" documents weren't found on Ceglia's computers, though "several unsigned versions" of the contract that are "very similar but not identical to the Work for Hire document" were found, Wired states. Despite being "backdated" to 2003, the copies were created in 2011 - long after the work with Zuckerberg.

Ceglia is a "career criminal," Facebook said. The company's Initial Public Offering valued it at around $100 billion dollars.

Ceglia is entitled to "his day" in court, his representatives added.