After you complete your Voter Registration Card, simply drop it in the mail (the address will be preprinted on the front), then wait for your Voter Notification Card. The Department will send this notice upon receipt of your completed registration. If you do not receive a notification in three to four weeks, call (415) 554-4375.

To be eligible to vote in an election, your mailed-in form must be postmarked no later than 15 days prior to the date of the election. Note that if you've recently moved, changed your name or party affiliation, you are required to re-register. To check on your voting status, call the Elections Office at (415) 554-4375. Make sure to register early — at least a month in advance of the next election, if possible — to avoid any delays. 

See the City and County of San Francisco Department of Elections Web site for more information as well as details on absentee voting.