According to reports the document was filed on April 23rd and under Sandra's initials -- backwards ... B.A.S.
Jesse James was also identified by his initials -- J.J.G.
The petition says, "The marriage between Petitioner and Respondent has become insupportable because of discord or conflict of personalities that destroys the legitimate ends of the marriage relationship and prevents any reasonable expectations of reconciliation."
Also stated in the papers, Sandra is a resident of Texas. Jesse "is of legal age and agrees to proceed in Austin, Travis County, Texas."
Sandra has reportedly hired the firm of-- Chaffe McCall -- which she has used in the past.