for a waiver to have validity in a courtroom in this state it helps to have it witnessed and notarized .
but i went thru a lawsuit one time years ago and that particular judge held the "friend of his "
feet to the fire on a note i put on the final check to this particular scheme artist that said "paid in full " in the comment area .
i thought we were done when we walked into court and the judge well hello "Jerry" with a big smile on his face
not sure about legality and or weight some waivers hold in court , but all the guides make you sign one that i have ever been out with none the less .....
i would tend to think a signed "covid clause " waiver would have some decent weight in court though