Forgot to put my name on an Envelope?

I tried out for a ballboy in the US OPEN today. I waited for like 2 hours on line before hey started collecting information. I forgot to put my name on the Envelope that they mail to you if you qualify for the Second round of tryouts. I put everything else though, my address, city, zipcode, etc just FORGOT MY NAME AND THEY SAID NOT TO basically because if the post office cant read it they wont send it.Will they setill send it if its missing a name?