https://www.uscis.gov/sites/default/files/files/form/i-485instr.pdf
All Form I-485 applicants, except refugees and asylees, must submit a photocopy of their birth certificate issued by
the appropriate civil authority from the country of birth. Although refugees and asylees are not required to submit a
photocopy of their birth certificate, if the birth certificate is available, refugees and asylees should submit a copy of the
birth certificate. USCIS will only accept a long-form birth certificate which lists at least one parent.
If your birth certificate is unavailable or does not exist, you must prove its unavailability or nonexistence and provide
acceptable alternative evidence of birth. (Refugees and asylees do not need to prove unavailability or nonexistence
of their birth certificate.) You can look up your country of birth on the following website, travel.state.gov/content/
visas/english/fees/reciprocity-by-country.html, to see if birth certificates are known to be unavailable or nonexistent
in that country.
If this resource shows that birth certificates from your country of birth are generally unavailable or nonexistent, you
do not need to do anything to prove that your birth certificate is unavailable or nonexistent.
If this resource does not show that birth certificates from your country of birth are generally unavailable or
nonexistent, you must submit an original document from the relevant governmental authority explaining why your
birth record does not exist and indicate whether similar records for the time and place are available.
When your birth certificate is not available or does not exist, you must submit other acceptable evidence relating to
the facts of your birth, such as church or school records, hospital or medical records, personal affidavits, or similar
evidence.