Wyo. Stat. § 11-34-122: Release of mortgage.

When the mortgagor or his successor in interest has fully paid any mortgage, the board shall furnish him with a proper release of the mortgage executed by the president of the board and attested by the director of the office of state lands and investments with the seal of the board thereon, and the mortgage papers belonging to the loan including abstract of title and insurance policies assigned, shall be returned to the mortgagor or successor in interest.