037-5 Wyo. Code R. § 5-10
The proof of ownership of lands involved in a petition can be in the form of a certificate from the county clerk, but it may be in some other form, such as a copy of land purchase contract or recorded warranty deed. If the lands are being purchased by the petitioner from the owner of record, a consent to the petition by the seller is required. If the ownership is joint in nature, all co-owners must either join as petitioners or consent to the petition. In the case of husband and wife ownership, it is best if both parties sign the petition as petitioners. When all or part of the lands involved are managed by a federal government agency, the petitioner must show some authority to request the proposal in the petition such as a lease, special use permit, etc. In addition, consent to the petition from the government agency must be obtained. If the lands involved are State owned, a consent from the State Land Office is required. Proof of ownership must also be provided for all persons consenting to the petition.
037-5 Wyo. Code R. § 5-10