My dear Aunt “Sally” was my one actual call rather than a text. And yep, “I tried that link thing but...” followed by, “of course I’m coming.” Her feelings would have been so hurt had she shown up and found her name missing from the seating chart. it was much easier to call her, catch up a bit, and check in with her.Goodness I couldn't imagine this. Would you have a bouncer at the door or something? And what would happen when Aunt Sally gets really upset because she is 100% certain that she tried that "link thing" and was sure she had rsvpd?
If these are people that I liked enough to invite to the wedding, that I wouldn't mind sending out a quick reminder text to double check. Seems like turning people away at the door would lead to a lot of long term drama amid a family/friend group - and that's not how I would want my/my child's wedding to be remembered.