Conoco is a huge slow-moving company and operates largely through emails via royalty owner portal. First question is whether the royalties are in suspense and held by Conoco. Have any funds been escheated to a state treasury? As an heir, you need to put together all the documentation, including deeds or probate court order filled in deed records, prior owner information including name and Conoco owner number (or owner number from Concho or other company acquired by Conoco), and if possible a copy of royalty check to prior owner or estate, and Conoco ownership transfer form. Scan and send all information with a cover letter by email and by certified mail. Letter should reference the prior owner, wells and cite leases with county recording information. This will make it easier for Owner relations to find the right landman or division order analyst to verify the title transfer or let you know what other information is needed. If there are other heirs, you can all do this as a group to cover 100% of the prior owner’s interest.