When my sister passed in 2001 at the age of 54, I went through all her papers. In one otherwise ordinary file was a bearer certificate from her Credit Union, for 100 shares worth $2,000.
You can’t be too carfull. Landfills are forever.
And you can’t be too careful who you trust.
As one of our 6 siblings (the one who got my Dad’s house) told us, the contents of his bank safety deposit boxes were “just old papers and junk.”