Joyce: EXPOSED: SCANDAL OF DOUBLE VOTERS 46,000 registered to vote in NY city & Fla. RUSS BUETTNER 12:00 AM Voting twice in an election is punishable by up to five years in prison. Some 46,000 New Yorkers are registered to vote in both the city and Florida, a shocking finding that exposes both states to potential abuses that could alter the outcome of elections, a Daily News investigation shows. Registering in two places is illegal in both states, but the massive snowbird scandal goes undetected because election officials don't check rolls across state lines. The finding is even more stunning given the pivotal role Florida played in the 2000 presidential election, when a margin there of 537 votes tipped a victory to George W. Bush. Computer records analyzed by The News don't allow for an exact count of how many people vote in both places, because millions of names are regularly purged between elections. But The News found that between 400 and 1,000 registered voters have voted twice in at least one election, a federal offense punishable by up to five years in prison and a $10,000 fine. One was Norman Siegel, 84, who is registered as a Democrat in both Pinellas Park, Fla., and Briarwood, Queens. Siegel has voted twice in seven elections, including the last four presidential races, records show (see opposite page). Officials in both states acknowledge that voting in multiple states is something of a perfect crime, one officials don't have the means to catch. "I can't imagine how the supervisors would have access to that information," said Jenny Nash, spokeswoman for the Florida secretary of state. "As far as I know, cross-state registry has not been discussed.