B1/B2 visa for family while undergoing Adjustment of Status [US]

[rjoker]

Hello,

I'm graduating from graduate school in April 2017. I just picked up a letter of invitation from our school's international office to send to my family so they can show my expected date of graduation and apply for a B1/B2 visa. My parents applied for B1/B2 5 years ago to come to the...

[yellowcake]

I have applied for a B1/B2 with the purpose of visiting friends.

I was wondering if I need to produce an original signed letter of invitation stating duration of stay together with a copy of the passport (with signature page) and residence permit of the person who I am staying with ?...