From the NY Times:
The city’s Board of Elections routinely reminds New Yorkers that the election night vote count is unofficial and preliminary.
Still, the difference in the results from Nov. 2 and in the returns formally certified by the board on Wednesday seems striking: The board found 195,055 votes, or 17 percent more votes, than were originally reported.
That differential — which nearly equals the total vote for governor in the Bronx and Staten Island combined — does not include an additional 28,442 affidavit ballots that New Yorkers cast at the polls on Election Day because of missing registrations or other reasons and another 30,665 absentee and military ballots and scattered write-in votes.
The preliminary machine tally alone swelled from 1,145,826 on election night to 1,366,881 in the official version.
The largest cache of newly found machine ballots was in Queens — about 80,000, or 31 percent more than were reported on election night.
A Board of Elections spokeswoman had no immediate explanation for the disparity.
While the discrepancy between the number of votes counted on election night and those that were ultimately certified is noteworthy, it was not large enough to reverse the results in any election.