Wyo. Stat. § 34-2-130
If any lessee, his personal representative, successor or assign, as the case may be, after an oil, gas or other mineral lease has expired, been cancelled, surrendered, relinquished or otherwise terminated shall for the space of twenty (20) days after being thereto requested, fail, refuse or neglect to record in the office of the county clerk of the county wherein the lands described in said lease are located a recordable certificate or deed of discharge or release thereof, he shall be liable to the lessor, his heirs or assigns for all damages occasioned by such failure, refusal, or neglect, to be recovered in a civil action. The lessor's request for discharge or release shall be in writing and delivered to the lessee by personal service or registered mail at his last known address. A letterpress or carbon or written copy of said demand, when shown to be such, may be used as evidence in any court with the same force and effect as the original.
W.S. 34-2-130