How do you cash a check? Can a parent cash a check for his/her child without the child being present?
I am 16 and I do not have a bank account but I received a check in the mail for payment for a job I worked at

The only problem is that when I came home, the envelope with the check in it was already open, so someone(maybe my parents) may have stolen something from it

I still see a check telling me how much money I should get and how many hours/overtime I worked and everything

But I don't know how to cash it

What if someone already cashed it?
How would a bank or a bank machine know its me that's cashing the check?

What if my parents stole my check and cashed it, saying that they're cashing it for a dependent?