Washington Revised Code Title 7. Special Proceedings and Actions § 7.36.030. Petition--Contents

(1) By whom the petitioner is restrained of his or her liberty, and the place where, (naming the parties if they are known, or describing them if they are not known).

(2) The cause or pretense of the restraint according to the best of the knowledge and belief of the applicant.

(3) If the restraint be alleged to be illegal, in what the illegality consists.