Actually it's a bond not a stock certificate, it got paid.In a bankruptcy share holders get nothing, bond holders are made whole. Or at least partially whole.
You're presenting the scenario where the owner of the bond turned it in when matured and got paid.
I'm presenting the scenario of where I am rummaging through the attic and this was with a pile of papers. It's
worthless. Too late....
There is a website where you can research whether a given bond is still good/valid or not, I'll have to find it. That is where I found out that an insurance policy my parents had 40 years ago was no longer valid.