I have a certificate saying I'm qualified in basic food hygiene. Took a three month evening class course then passed the exam.
I've never used it but at the time I had an idea to open a Bistro locally. The certificate I have is the minimum required to legally open a food outlet.
Still might do that thing, I had this idea to open a fast food vegetarian outlet or maybe a sort of up-market veggie cafe playing some decent music.
Must admit though, running a food outlet is hard work, early start, on your feet all day and constant cleaning.