do you have to sell hand made products atr a craft fair. i didnt know if there where any rules on this
It depends on the fair. Some are quite strict, others don’t seem to care. Look up the rules of the fair you’re thinking of applying to and see what they say.
If it is a proper hand made craft fair, the organiser asks to see your work first, before they allow you a stall. Even then it can be difficult to get a stall, as the organiser may already have lots of makers already producing the same craft as you.