The video in the tweet you link to is explicitly as in the headline: Trump tells people to mail in a ballot and then to go vote in person. He repeats it multipl

The video in the tweet you link to is explicitly as in the headline: Trump tells people to mail in a ballot and then to go vote in person. He repeats it multiple times and is very clear that the "check" is done by them attempting to actually vote, not merely asking to confirm the ballot was received. I had really assumed it would be much more ambiguous than this from the headlines.