The petition therefor must be under oath, setting forth the nature and extent of the petitioner's estate, and describing the premises as accurately as may be, and that the petitioner is credibly informed and believes the defendant makes or may make some claims adverse to the petitioner, and praying for the establishment of the plaintiff's estate, and that the defendant be barred and forever estopped from having or claiming any right or title to the premises adverse to the plaintiff.
Iowa Code § 649.2