In reality you should be able to get an anonymized reference number to show your vote was tabulated correctly though.
Right now it comes down to an actual official finding your paper ballot with hand marked tracking and presuming the computer read it correctly on an overall vote total.
Being able to do this anonymously and securely is where the problems lie. Which is also why digital only voting still isn’t a thing anywhere.
I mean to make sure they’re lifted off the other sticky note like a spring. If he’s using tape he’s cheating.