Hi @Marc_Olck,
I understand you would like to exclude any fraud and have a honest voting.
If participants refresh the website, they won’t have the possibility to vote again. However, they can open the event on a different device and/or browser and that would allow them to cast more votes.
If you don’t lock the voting, they will be able to change their votes.
What you can do is, run the poll but lock the voting, give your audience time to think about their submissions, then unlock the voting, give them max 1-2mins and then lock the voting again.
Alternatively, you can restrict access to your event to a specific domain or specific emails addresses. Meaning, only those who are added to the event can access it. The feature is available from our Professional plan and you can read more about it here
As for the built in fraud check - yes. If an event receives a very unusual high amount of votes within an extremely short period of time, we are alerted.
Would these options work for you?