Are you distinguishing surface from minerals? Are the records in your personal name or your father? Most often, the royalty owner and royalty decimals are provided by the operator to the county and appraisal company. The county does not search the deed records and make title changes. To what address did the county send the Notice of Appraised Value for the royalty interest? Pull together the information and send it, along with a letter detailing your questions, by certified mail to the operator. Such as any deeds, recorded probate, and tax records.