A previously unknown PAC is distributing pre-marked ballots identical to those used in the North Carolina primary. They aren’t marked as “Sample Ballot” but actually carry a header that says “Official Ballot”.
They’re so convincingly real that some voters have turned up at early voting sites and tried to submit them as-is. Complaints to the State election board and DOJ have been ignored.
The PAC is so new that it hasn’t made any filings with the state, so there’s no way to know who they are or where their money is coming from, but a quick look at the fake ballot may provide some clues. Just guessing, but this is probably not from Hillary’s people.