An eye-opening metric on the Crimean vote came out of Sevastopol, the host of Russia’s massive naval base, where turnout was logged at 123 percent of registered voters.
Reports were that anyone with a passport was allowed to vote, and it didn’t have to be a Ukrainian passport. One reporter reported getting a ballot with a Russian passport, and with a large number of Russian troops based there, it is possible that they were part of the count.
Not that this was liable to significantly alter the result. With the pro-Russia vote in the high 90%s, and most of the opposition boycotting the referendum, the result was a foregone conclusion.
International observers who oversaw the referendum also said the vote was carried out surprisingly professionally considering how little time there was to prepare, and even if who was allowed to vote was a little bit unclear, the vote itself seems to have been credible.