To be eligible to vote at the General Election, you must be a Singapore citizen who is at least 21 years old as at 1 February 2015, and your name must be in the latest certified register of electors for your constituency.

Your polling card will be sent to the address stated on your Identity Card. 

You can find out whether you are in the latest certified register of electors and verify your personal particulars in the register via eServices, or at any of the inspection centres such as the Elections Department or any community centres/clubs.

Source: ELD

This article is accurate as of Aug 2015.