In order to receive a birth certificate from the Federal Republic of Germany you write the "Standesamt" (Registrar's Office). Your letter should be addressed to the "Standesamt" of the place (Village, Township, City) where you were born.
The German phrase for asking for an international birth certificate is:
"Ich bitte um Ausstellung einer internationalen Geburtsurkunde für ... (first name/middle name/last name), geb. am ... (date of birth) in ... (place of birth). Eltern: ... (name of father) und ... (maiden name of mother)."
Please do not indicate the month of your date of birth with a number but in letters since it might otherwise lead to a mix-up (e.g. the date 10/12/56 in Germany means December 10, 1956). Please do not forget to mention your name and address. Information on the fee will be sent to you with the certificate. You should also enclose postage of 2 $ (also payable in international postal reply coupons).
Please do not forget to mention your name and address.
If you are a US-citizen or if you were born in a U.S. military hospital, you may contact the US Embassy for further assistance.
It can be reached as follows:
Botschaft der USA
Konsularabteilung
Clay-Allee 170
D - 14195 Berlin tel.: 01149-30-819-7454
fax: 01149-30-831-4926 Internet: www.usembassy.de