Repatriation, Art. 116 Abs. 2 GG
Former German citizen an their descendants who were denationalized in the time from January 30th, 1933 and May 08th, 1945 based on political, racial or religious reason may be repatriated.
The German citizenship lost any Jewish people who had their habitual residence abroad since November 27th, 1941or later, in particular cases by law.
For repatriation it is necessary either to file an application for repatriation, or an application for residing in Germany. This also applies to descendant of Nazi-persecuted affiliated.
A descendant, who was born after one of his/ her parents forfeited the German citizenship and before the repatriation, is eligible for repatriation, Art. 116 Abs. 2 GG if he might have obtained the German citizenship by law or for the case of nationality by birth.
Since June 30th, 1993 a child obtains the German citizenship even if only one parent is German. For the case that only the father is German and the child is born to an unmarried mother, the filiation of the authentication of fatherhood would be necessary.
In proof of the claim, several authenticated documents must be brought forward. Some of those documents can be found in German archives or government agencies. In particular cases additional documents are required, e.g. birth certificates or marriage certificates of the grandparents.