DH worked for a company for several years but left a few years ago. While there, he had participated in the ESOP program. A few months after he left, they sent him a common stock certificate showing his shares. At the time, the stock was completely worthless & I filed the certificate away. Now I'm going through papers & came across it. I looked them up to see if they had closed yet & they are doing surprisingly slighly better - not great at all but $7 higher than than the .50 they were at when he left. BUT they now trade under a different set of letters, same company name, address, etc. So is this certificate something we could sell to get the money? I am not skilled in this area & have no idea how this works or if the certificate is valid in those terms. Also, is it invalid if they now trade under a different nasdaq abbreviation? Everything else is the same.