<P> Other cases where German citizenship can be lost include: </P> <Ul> <Li> Persons acquiring German citizenship on the basis of birth in Germany (without a German parent) lose German citizenship automatically at age 23 if they have not successfully applied to retain German citizenship . If it is desired to maintain a foreign citizenship, application must be made by age 21 . </Li> <Li> A German citizen who voluntarily serves in a foreign army (over and above compulsory military service) from 1 January 2000 may lose German citizenship unless permission is obtained from the German government . From 6 July 2011, the permission to serve above compulsory military service is automatically given for the armies of EU, EFTA, and NATO countries and the armies of Australia, Israel, Japan, New Zealand, and the Republic of Korea . </Li> <Li> A German child adopted by foreign parents, where the child automatically acquires the nationality of the adoptive parents under the law of the adoptive parents' country . (For example, a German child adopted by Americans prior to 27 February 2001--the effective date of the U.S. Child Citizenship Act of 2000--would not have automatically lost his / her German citizenship, because the child did not automatically acquire United States citizenship by virtue of having been adopted by U.S. citizens .) An exception applies where legal ties to the German parent are maintained . </Li> </Ul> <Li> Persons acquiring German citizenship on the basis of birth in Germany (without a German parent) lose German citizenship automatically at age 23 if they have not successfully applied to retain German citizenship . If it is desired to maintain a foreign citizenship, application must be made by age 21 . </Li> <Li> A German citizen who voluntarily serves in a foreign army (over and above compulsory military service) from 1 January 2000 may lose German citizenship unless permission is obtained from the German government . From 6 July 2011, the permission to serve above compulsory military service is automatically given for the armies of EU, EFTA, and NATO countries and the armies of Australia, Israel, Japan, New Zealand, and the Republic of Korea . </Li>

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