the recipient never verified their email address. We want to remove her and reinvite her. how can we do this? we've tried unticking her name but she still stays on list
You can remove the "Share" by clicking on the user along the bottom of the window and choosing "Remove" (this will also remove them from the Email Notifications list):
Then you can add them back to the Email Notfications which will share the form with them again and will send another Email that the form has been shared.