[Yosemitest]

Keep you "buy" paperwork to prove they're authentic.
And depending on just how bad things are when you "liquidate" them, you can always "sell" them back to the company that you bought them from.

[wrench]

Paperwork is easily forged, and not worth the paper it is on in a real emergency.

For estate planning, it is workable, in a SHTF situation, not so much.

Even today, if you wanted to trade your “papered” bars, you would need to sell it to your dealer, and use the cash to make your purchase. Few folks would take it .