What exactly is 797 Visa approval Letter?

[Holdingon 16]

 

USCIS is requesting for me to submit a copy of 797 Visa Approval Letter for my step son.

He is 10 and has been in USA for almost 1 year now. (11.5 months). All documents have been submitted and process is going well but I am not exactly sure of what the 797 visa approval letter is.

He did receive a 797 stating employment authorization with valid dates on it. Do you think that is what USCIS is asking for?

I can not seem to locate a specific 797 stating visa approval.

[aleful 1,905]

did you send the approval of the k2 visa?

 

if you did, they might have lost the letter where your stepson was approved for the k2 visa

 

 

[Holdingon 16]

The approval letter for his K2 visa is what I need.

I can not finds records of an approval letter. He applied for the K2 went for the interview and got approved. Visa got placed in his passport.

That is the only form of approval I can find or can  recall.

 

Do you know if there is a specific 797 which I should have received?