Soldato
Fireproof safe at home, (along with the passports, backup discs and David Cameron's soul).
Its not needed at all times.
And before the paper version, a little cardboard thing with bits of paper stuck in it. They went in the 60s or 70s, but I still have my little cardboard version too, let alone the paper one.I do.
Dad doesn't, back in his day I think it was just a piece of paper saying well done, which he has since lost...I think.