Primary Documentation
Birth Certificate issued by State government or Consulate abroad
Unexpired Passport
Certificate of Citizenship
Certificate of Naturalization
Civil Marriage Certificate
Divorce Decree
Notarized Name Change Certificate

Secondary Documentation
Baptismal certificate, with the seal of church, showing the date and place of birth in the United States and the date of baptism.
Affidavits sworn by persons who are familiar with the events of birth of the petitioner
School records (preferably from the first school) showing the date of admission to the school, the child’s date and place of birth, and the names and places of birth of the child’s parents.
Census records
Military proof

Proof of the relationship
Different documents should be submitted depending on the relationship involved in the petition:
Natural Parents (born in wedlock):
The child’s birth certificate. If the child’s name differs from the name on his or her birth certificate, evidence of the name change must be submitted.
Household Registration
Marriage Certificate of the parents
Divorce decrees, death certificates, or other documentation evidencing the termination of all prior marriages of both parents

Natural Mother (born out of wedlock):
The child’s birth certificate. If the child’s name differs from the name on his or her birth certificate, evidence of the name change must be submitted.
Household Registration
Marriage Certificate of the mother if her present name differs from that on the birth certificate of the child
Marriage Certificate of a married daughter

Father/child relationship with the child born out of wedlock (file for the natural father) should provide following documents:
The child’s birth certificate. If the child’s name differs from the name on his or her birth certificate, evidence of the name change must be submitted.
Household Registration
Evidence that a bona fide parent-child relationship is or has been established while the child is unmarried and under 21 years old, or the child has been “legitimated” under the law of the child’s residence before the child’s 18th birthday and the father has legal custody of the child
Evidence that a bona fide parent-child relationship is or has been established while the child is unmarried and under 21 years old, or the child has been “legitimated” under the law of the father’s residence before the child’s 18th birthday and the father has legal custody of the child
Money Order Receipts
Canceled checks
Income Tax Returns
Medical or insurance records
School records
Correspondence between the father and child
Notarized affidavits from friends, neighbors, school officials or other close family members, making proof for the father/child relationship

Step-parents：
The child’s birth certificate. If the child’s name differs from the name on his or her birth certificate, evidence of the name change must be submitted.
Household Registration
The marriage certificate of the step-father/mother to the natural mother/father
Divorce decrees, death certificates, or other documentation evidencing the termination of all prior marriages of the step-father/mother and natural mother/father, such as annulment decrees

Adoptive Parents:
The adoptive child’s birth certificate. If the child’s name differs from the name on his or her birth certificate, evidence of the name change must be submitted.
Household Registration
Evidence that the parent has the legal custody of the child for at least two years, and is physically residing with the child for a two-year period
A certified copy of the adoption decree, showing that adoption was completed before the child’s 16th birthday
Household Registration of the child
School Report Card of the child (signed by the adoptive parents)
Affidavit of the teacher (the adoptive parents accompany the child)
Certificate of the doctor (the adoptive parents accompany the child and pay it)
Credit Card (paying fee-for-service, child support)
Money Order Receipts (child support)
Photos taken together
Passport (if the adoptive parents have taken the child abroad for travel)
Notarized affidavit from Committee of Lin or Li in Taiwan, showing the cohabitation
Notarized affidavit from Resident Committee in China Mainland, showing the cohabitation
Life Insurance
Medicare
Notarized affidavit from Church, showing the cohabitation