please advise on check list

[rravi]

I am attaching the cheklist for visitor visa.Am i missing sthg please advise.And also i dont have birth certificate.IS it mandatory?And is the original marriage certificate mandatory?

I dont what is ASSURANCE OF RETURN--AFFIDAVIT,is it necessary?

Documents from visitor

passport,
1 photograph,
ds156(for my dad > 55yrs)
ds156,ds157(mom < 55 yrs)
visa fees receipt from HDFC
Interview appointment letter
PROPERTY DOCUMENTS

Documents from Sponser

I-134 (affidavit)
employment letter
bank sponser letter for immigration purpose
bank statements(last 6months)
invitation letter
letter to consulate
copy of recent 6months paystubs
copy of past 3 years w2 returns
Photocopies of all passport pages
copy of h1 petition
COPY OF Initial APPROVAL NOTICE
ADDRESS PROOF
MARRIAGE CERTIFICATE
ASSURANCE OF RETURN--AFFIDAVIT

[immihelp]

Read https://www.immihelp.com/usa-visas/visitor