A few weeks ago I myself was deregistered by the Board of Elections because I shared the same first initial and birthdate of a voter in the bronx. I went to the Queens County BOE in order to get a court order to vote (which I did successfully). While I was there, another woman found out the reason for her deregistration. Apparently she had signed a document changing her address, thereby deregistering her automatically. Looking at the documents she found that her signature was forged as well as all of the other information on the document.