list of documents for sponsoring parents to US




I am on H1 Visa (along with my wife on H4) and I am planning to invite my parents (sponser)  to USA, can you please confirm the list of documents involved in 


this process and do i need to mail these documents to them or scanned copies will work? Also we are expecting baby by end of July. is it good option that our 


parents give this reason while they go for their visa interview?





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