Savings Certificates How Do You Find Out About An Old Savings, Certificate In Your Name, From A Bank That No Longer Exist?

How do you find out about an old savings, certificate in your name, from a bank that no longer exist? - savings certificates

I have a savings certificate of the 70 that my grandparents left me, but the bank savings of the Interior and the Association of Laon in Mobile, AL no longer exists! I really want to check on the account would be very grateful for any help, thank you!