All questions as to advancements made or alleged to have been made by the decedent to his heirs may be heard and determined by the county court, and must be specified in the decree assigning and distributing the estate; and the final judgment or decree of the district court, or in case of an appeal, of the district court or Supreme Court, is binding on all parties interested in the estate. R.L.1910, § 6479.
Oklahoma Legal Code