Wyo. Stat. § 2-7-206: Proof by affidavit; filing thereof.

(a) The proof of publication of the notices required in W.S. 2-7-201, 2-7-202 and 2-7-203 shall be by affidavit of the publisher.

(b) The proof of mailing or delivery of all notices required in W.S. 2-7-201, 2-7-202, 2-7-203, 2-7-204 and 2-7-205 shall be by affidavit of the personal representative or his attorney.

(c) The affidavits for proof of publication and mailing notices shall be filed with the clerk of court from which the letters were issued.