silver investment: The Lowest Risk, Highest Return Potential, page-61

Tubs

80kg is not large in terms of volume.
Without prejudice, there have been anecdotal reports that some sellers of silver who have allocated reserve
facilities have multiple owners for each bar. viv a vis Fractional Reserve style.
If the SHTF and everyone runs for their holdings it is indeed possible that you may not receive yours.

I am sure that a clever chap such as yourself can come up with ways to secure your holdings for yourself.
The money you save between the allocated holding price and the outright purchase price is not that large in the grand scheme of things and knowing that your investment does not depend on the continued well being of the company you are with is money well spent.

It sounds trite but it is true " if you don't hold it , you don't own it."

If you are doing this as a safety play then it pays to play it safe.