Wyo. Stat. § 22-15-104: Grounds for challenge.

(a) A person offering to vote may be challenged for the following reasons:

(i) Not a qualified elector;

(ii) Not entitled to vote in the precinct;

(iii) Name does not appear on poll list and the person cannot meet the requirements to register at the polls;

(iv) Not the person he represents himself to be;

(v) Has already voted;

(vi) For in person voting, failure to present acceptable identification immediately before voting at the polling place or absentee polling place.