Yesterday in the news were reports of a Voter Registration Fraud issue caught in Florida where the agency submitted 106 applications to change registration status, voters addresses, party affiliation etc. Well some of the addresses they changed were changed to gas stations, office buildings, etc. Meaning that if not caught by the county elections officials those voters would not have been able to vote, because they would have showed up to their polling precinct and not have been on the rolls. While this was caught how many times has this happened in the past? The company who in this case was being paid by the NRNC was hired to register people in numerous states.
While this unfortunately is the most common form of voter fraud, you can protect yourself from it. Check your registration status before it is too late. The site below give the links to check your voter registration status in every state.
http://www.canivote.org