Wyo. Stat. Ann. § 40-19-103

Notices required by this act shall be given personally or sent by first class or registered mail to the known residential address of the consumer. Notice, if sent by mail, is given when deposited in a mailbox properly addressed and postage prepaid. Notice may also be given upon delivery of the communication to the consumer by email or other electronic means if the consumer provides written consent to receive notice by email or other electronic means in response to a clear and conspicuous request for consent.