Where were you born? I believe that for all births after 1969, births needed to be registered. Check with the local authorities where you were born. If that doesn't apply, then you need to get at least two older relatives (siblings, uncles, aunts, whatever) who can swear of affidavits that you were born on such and such a date and know that as your date of birth. If that doesn't apply then you must swear out an affidavit outlining your difficulties in obtaining a birth certificate and the reason why it is unavailable.