Had an interview at Mcdonalds, I think I misheard the lady interviewing me and now I don't know what permit to bring

I'm 18 and I just had an interview at mcdonalds. I don't know exactly what I'm going to be doing there, they haven't told me. I was nervous cuz it was my first interview, but I think it went okay. She told me to come back on Monday with some sort of permit. I didn't hear what permit she was talking about, she had an accent. I asked her to say that again, I still had no idea what she said. I was so nervous that I just said "okay" and moved on, like an idiot. Now I have no idea what permit to bring.

I remember she said it was 30 dollars and you do it online. Someone please help!

Edit: I think its a food handling permit. It's 30 dollars. I'm gonna look real stupid if I bring in the wrong thing on Monday.

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