Does "vote by mail" require any sort of ID? If not, how on earth is this more secure than a ballot box?
Washington state requires you to provide a driver license number or state ID number when registering to vote online (WA state license numbers are a combination of a person's initials, last name, and date of birth). You also have to check a box that says you're a US citizen and another box saying you'll be over 18 by the time of the next election. They also have a text-based CAPTCHA at the end of the form so you know that there can't be any sort of fraud.