Proof of relationship

[dulany]

I am trying to file I-130 for my sister. One of the requirements is to furnish a proof of my relationship. What sort of document do they normally accept as an evidence to prove that she is my sibling? Please advice.
thanks in advance.

[prabh_68]

first evidence would be birth certificates of both of u i.e. yours and ur sister's showing your parents name! Secondary proofs are school leaving certificates, old passports etc.

[silver_ist]

you need chain of birth record