Duplicate Proxy
  
A duplicate proxy is a fancy way of saying “a do-over” by shareholders...you know, people who get a say in the company since they’re invested in that company’s stock. Duplicate proxies are a thing companies decide shareholders can do.
When a shareholder wants to ctrl-z their vote and vote again, a duplicate proxy allows them to re-vote, canceling out their old vote, which is replaced with the new one. In order to get their new vote in when it’s corporate issue voting time, their second vote still needs to hit the deadline, or their new vote won’t be counted.
To "jk, changed my mind" a vote, shareholders must submit a proxy form. These forms are no joke. Companies have to submit their own proxy statements to the SEC when they have shareholders vote on making changes, which allows the SEC to get all up in a company’s business. Because...that’s business.