If you want your visitors to vote only once per session, choose to enable vote limit. If vote limit is disabled, visitors can vote as many times as they like.

1. Login to your One Admin control panel, click on Preference link.
   
   
2. Underneath the title 'Vote Limiting', check the box to stop multiple votes per person. Clear the checkbox will allow multiple votes.
   
   
3. Click on the 'Save' button at the bottom of the page to submit changes.

Note: Vote Caster is cookies based, so if your visitors do not have cookies enabled within their browsers, the vote limiting will not works properly, and still allowing multiple votes.