They presumably scan each envelope as it comes in, to validate the signature and should capture the time stamp as well. But in NV they separate the envelope from the ballot so once it is validated it goes in and no way to go back and re-check it. In NV they are said they have a 40% “threshold” to see the signature matches e.g. if it is 40% close to the one on file they pass it through. But even this number seems totally arbitrary and I am not even sure what they look for that constitutes 40%. Sure, people’s signatures change over time. All the more reason to regularly scrub or re-confirm the voting rolls and force new registrations. But many people sign their names the same way they learned how to write in cursive in grade school. So 40% threshold is likely easy to cheat the computer.
Here, had to use a barely-a-coffee-stir-stick that had no strength. Signed, cursive of course.
But I wonder - given your comment - is print allowed?