B2 visa

[lady]

Hi, I need some advices
I want to invite a friend to USA but I'm not a citizen yet. I want to know what documents or any other papers does he need. May be some of my friends can help him with invitation, but how to prove the connection of both of them
Thank you

[immihelp]

Did you read our visitors visa section at https://www.immihelp.com/usa-visas/visitor ?