06/28/2010 05:12 am ET Updated May 25, 2011

Sandra Bullock Divorce Papers Filed In Austin

TMZ has learned Sandra Bullock filed for divorce in Travis County Court in Austin, Texas ... and the reason it didn't surface until now is because Sandra turned it into a puzzle.

The case was filed under Sandra's initials -- backwards ... B.A.S. Jesse James was also identified by his initials -- J.J.G. Jesse's middle name is Gregory.

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