It was postmarked eight days after we dropped it in a mailbox in the town of Van Buren. We talked with Onondaga County Elections Commissioner Dustin Czarny after the last piece of mail arrived with a late postmark. That raised alarms for the Commissioner. “If it was postmarked after Election Day,” said Czarny. “We would have to invalidate this ballot.”
https://cnycentral.com/news/local/update-missing-envelope-from-cnycentrals-usps-test-located