Election officials do their best to get results out on election night or the next morning, but always with a note that they are unofficial. Perhaps
preliminary would be a better word than
unofficial. These results do come from an official source, unlike news reports of estimates derived from exit polling. But they haven’t been through all the checks and revisions that occur following the election. Those post-election activities are essential to producing final, official, certified results that merit confidence. Nothing done quickly can have the same level of assurance. Turning the unofficial results of election night into the official results that allow a winner to receive their election certificate is called
canvassing. In Minnesota, the canvass process includes administrative checks, formal board action, and a manual audit of randomly selected precincts. Election administrators in each jurisdiction produce a “canvass report” that tabulates the votes cast, as well as the number of voters, and Election Day and advance registrants. This largely repeats the information from election night. However, it reflects several kinds of cross-checking and the revision of any errors found through that checking. Most basically, the administrators check that the vote counts were correctly uploaded to the Election Reporting System. They do this by closing the loop back to the definitive source of information: the printouts from the tabulators.
Full Article:
Minnesota election administration explained: post-election checks - Minnesota Reformer
