evidence: Your ballot will come in the mail. You fill it out like a normal ballot, but you need to have witnesses: Either a notary public or two witnesses must be with you when you mark the ballot. (Because of the pandemic, during the 2020 elections only one witness was required.) A lot of other states use signature verification. They match the signature on the ballot to the one on file with an individual's voter registration. But signatures can change over time, and "matching" can be subjective. So North Carolia requires the witnesses or notary to verify that it's really you casting your ballot. Witnesses should verify that you marked the ballot yourself, but they should not see how you voted.