The voting pencil conspiracy theory is a conspiracy theory that using the pencils provided in British polling stations allows the result to be changed by MI5. [1] Promoters of the theory urge people to use pen on the basis that it makes it harder for MI5 to change the vote. [1] The theory originated with "Yes" voters in the 2014 Scottish independence referendum and was widespread among "Leave" voters during the 2016 United Kingdom European Union membership referendum. [1] On Twitter, the hashtags #Usepens and #Pencilgate were used to promote the theory. [2] [3] Legally, voters are free to use the pencil or bring their own pen. [4] The Electoral Commission states that pencils are offered due to greater reliability and reduced risk of ink being transferred across a folded ballot paper. [5]
The conspiracy theory later spread beyond the UK and featured in the 2022 Australian federal election. [6]
The conspiracy theory also spread to Canada in the 2025 federal election. [7] Canadian election law requires that a pencil be offered but voters are free to bring their own pen. [8]