You can never be sure that duplicated information is destroyed, but if you combine SSS with a dead-man's switch protecting an asymmetric private key, you can periodically invalidate a set of shares.
As a bonus, when you refresh the shares, you'll discover that at least a couple of your trusted parties have absolutely no memory of receiving that mysterious piece of paper from you back in 2022.
You can never be sure that duplicated information is destroyed, but if you combine SSS with a dead-man's switch protecting an asymmetric private key, you can periodically invalidate a set of shares.
As a bonus, when you refresh the shares, you'll discover that at least a couple of your trusted parties have absolutely no memory of receiving that mysterious piece of paper from you back in 2022.