Okla. Stat. tit. 16, § 83

The affidavit may relate to the following matters: Age, sex, birth, death, relationship, family history, heirship, names, and identity of parties, whether individual, corporate, partnership or trust; identity of officers of corporations; membership of partnerships, joint ventures and other unincorporated associations; identity of trustees of trusts, and their respective terms of services; history of the organization of corporations, partnerships, joint ventures and trusts; marital status; possession; residence; service in the Armed Forces; and conflicts and ambiguities in descriptions of land in recorded instruments.