A new website for Missouri voters who regret signing or mistakenly signed the pro-abortion initiative petition allows those people to withdraw their signature. It does not require a notary. Simply fill out the form on the website and it will be sent to the Secretary of State.
However, any voter who wants to withdraw their signature must do so before the pro-abortion groups drop off their petitions to the SOS’s office. That can be at any time between now and Sunday, May 5 by 5:00 PM. Once those petitions are dropped off, they cannot withdraw their signature.