In all proceedings under this act to determine the question of heirship of any deceased person it shall be necessary for an heir of the decedent, or a record claimant of some interest in the estate of such decedent to file in the proper district court a verified petition, setting out the name of the deceased, a description of the estate of which the decedent died seized, respecting which the question of heirship is sought to be determined, the names and addresses of all known heirs and record claimants, and the extent of the interest claimed by such heir or heirs of record claimant, if known. Laws 1919, c. 25, p. 41, § 2.
Oklahoma Legal Code