In California, the person registering is the check, since they are completing the form under penalty of perjury. See Section 2111 here: http://leginfo.legisl

In California, the person registering is the check, since they are completing the form under penalty of perjury. See Section 2111 here: http://leginfo.legislature.ca.gov/faces/codes_displayText.xhtml?lawCode=ELEC&division=2.&title=&part=&chapter=2.&art http://leginfo.legislature.ca.gov/faces/codes_displayText.xh... In the days before high mobility in the US, there tended to be an assumption that the clerk or registrar accepting the completed registration forms would be likely to know the registrant personally, so the laws tended to not expect any form of documentation beyond a completed form and a signature. source: former registrar of voters With the recent ginned-up moral panic over supposed voting fraud, calls for various forms of documentation now abound. My opinion is that any states that wish to require voters to have ID at the polls should be willing to provide such ID to the voters for free. To require the voter to spend money to be able to vote is effectively a poll tax, which were prohibited by the 24th amendment.