Facebook Chief Executive Mark Zuckerberg was served “legal papers” with his Caesar salad during lunch at the annual Allen & Co. conference for business and media elite in Sun Valley, Idaho.

The person approached Zuckerberg’s table, where he and COO Sheryl Sandberg sat and asked for his autograph before delivering the requisite phrase, “You’ve been served.”

Speculation is that the lawsuit is “privacy” related. Facebook was not able to provide a comment. Zuckerberg has not update his Facebook page about the incident.