Wyo. Stat. § 1-1-108
No voluntary partial payment of a claim based on alleged liability for injury or property damage shall be construed as an admission of fault or liability, or as a waiver or release of claim by the person receiving payment. Such payment is not admissible as evidence in any action for the purpose of determining the amount of any judgment, with respect to the parties to the occurrence from which the claim arose. Upon settlement of the claim, the parties may make any agreement they desire in respect to all voluntary partial payments. After entry of judgment, any such payment shall be treated as a credit and deducted from the amount of the judgment. If after partial voluntary payments are made it is determined by final judgment of a court of competent jurisdiction that the payor is liable for an amount less than the voluntary payments already made, the payor has no right of action for the recovery of amounts by which the voluntary payments exceed the final judgment. No voluntary partial payments shall be construed to reduce the amount of damages which may be pleaded and proved in a court proceeding between the parties.
W.S. 1-1-108