Colorado’s 64 county clerks will start mailing ballots Friday for the Nov. 3 election. With national concern about the integrity of mail-in ballots, Colorado is getting national attention for its system. Colorado began statewide vote by mail in 2013, although some counties adopted mail ballots before that.

We know voters and potential voters will have questions as voting begins and continues through Election Day. The Colorado News Collaborative and its members, including the Ouray County Plaind...