By Christine Stenner, German Attorney in the United States at Stenner Law| Foreign Legal Consultant (PA) | October 18, 2026
Understanding German citizenship for children who immigrated to the United States after World War II
Many Americans born in Germany after World War II assume they lost their German citizenship when they moved to the United States, became American citizens, or were adopted by American parents. In many cases, that assumption may be incorrect.
In brief:
- Becoming an American citizen did not automatically end German citizenship. What matters is how and whenS. citizenship was acquired.
- Adopted children, children who immigrated with their German mothers, and children who were U.S. citizens from birth are each treated differently under German law.
- Two German procedures may apply: a determination of existing citizenship (Section 30 StAG, no deadline) or citizenship by declaration (Section 5 StAG, deadline August 19, 2031).
- Getting the answer right requires understanding both German nationality law and historical U.S. immigration law.
Similar Family Stories, Different Legal Outcomes
During the postwar decades, thousands of children left Germany for the United States. Some accompanied their German mothers, who had married American servicemen. Others were adopted by American families. Still others were born in Germany to German mothers and American fathers and were American citizens from birth.
Although these family histories may appear similar, their legal consequences can be very different.
The critical question: How and when did the child acquire U.S. citizenship, and did that event affect German citizenship under the German law applicable at the time?
This is where German nationality law and historical U.S. immigration law intersect. Understanding both legal systems is essential to determining whether a person is already a German citizen or may qualify to acquire citizenship today.
Three Ways Children Became American Citizens
| Situation | How U.S. citizenship was acquired | Key German law question | Possible pathway |
| Adopted by American parents | Separate naturalization arranged by adoptive parents | Was guardianship court approval obtained (Sections 25 and 19 RuStAG)? | Section 30 StAG |
| Immigrated with German mother | Separate naturalization or automatic acquisition through a naturalized parent | Born in or out of wedlock? Was there an application for the child? | Section 30 or Section 5 StAG |
| U.S. citizen at birth (CRBA) | At birth, through the American parent | Was German citizenship acquired at birth (parents’ marital status)? | Section 30 or Section 5 StAG |
1. German Children Adopted by American Parents
During the postwar period, many German-born children were adopted by American families and brought to the United States.
What U.S. law required: Under the U.S. laws applicable at that time, adoption alone generally did not automatically confer American citizenship. Adoptive parents typically had to arrange a separate naturalization process.
What German law required: That naturalization did not necessarily terminate the child’s German citizenship.
Section 25 of the former German Nationality Act (Reichs- und Staatsangehörigkeitsgesetz, RuStAG) generally provided for the loss of German citizenship when a German citizen acquired foreign citizenship upon application. However, Section 19 RuStAG established additional requirements when the application was submitted by a legal representative on behalf of a minor. Depending on the circumstances, the loss of German citizenship required approval by a German guardianship court (Vormundschaftsgericht), subject to statutory exceptions.
Why it matters: In many historical adoption cases, American adoptive parents applied for their child’s U.S. naturalization without obtaining such approval. If the requirements for loss under German law were not satisfied, the child may have retained German citizenship despite becoming an American citizen.
For these individuals, an application for determination of German citizenship under Section 30 StAG (Feststellungsantrag) may be appropriate. There is no application deadline.
2. Children Who Immigrated with Their German Mothers
Another common situation involves German women who married American servicemen after World War II and moved to the United States with their children. Some children were born before their mothers married; others were born during the marriage.
Step one: Was the child German at birth? German nationality law treated children born in and out of wedlock differently before January 1, 1975. Children born out of wedlock to German mothers generally acquired German citizenship automatically at birth. Children born in wedlock to German mothers and American fathers generally did not acquire German citizenship through their mothers.
Step two: How did the child become American? For children who were German citizens at birth, the next question is what happened after they arrived in the United States. Some became U.S. citizens through a separate naturalization application. Others acquired U.S. citizenship automatically under provisions governing children of naturalized American citizens. These are legally distinct circumstances, and the distinction can be decisive.
For example, a child who acquired U.S. citizenship automatically through a parent’s naturalization may not have lost German citizenship under the former Section 25 RuStAG, because the child’s acquisition of American citizenship did not necessarily result from an application for the child. In contrast, when a parent submitted a separate naturalization application on behalf of a child, the interaction between Sections 25 and 19 RuStAG must be examined.
The applicable U.S. law also changed over time. The child’s age, immigration status, parents’ marital status, and the date of naturalization can all be important. Consequently, reviewing only a U.S. naturalization certificate may not provide the complete answer.
3. Children Born in Germany Who Were American Citizens at Birth
A third situation involves children born in Germany to an American father and a German mother who acquired U.S. citizenship at birth through their American parent. These children may have received a Consular Report of Birth Abroad (CRBA), sometimes referred to as a Certificate of Birth Abroad.
Citizenship at birth is not naturalization. A CRBA documents that the child acquired American citizenship at birth under U.S. nationality law. A child who was an American citizen from birth did not subsequently acquire U.S. citizenship through a naturalization application. Therefore, the German provisions governing loss of citizenship through foreign naturalization generally do not apply to that acquisition of U.S. citizenship.
The child’s original German status must still be determined. For children born before January 1, 1975, the parents’ marital status was particularly important. A child born out of wedlock to a German mother generally acquired German citizenship at birth, potentially alongside American citizenship through the father, provided the requirements of U.S. law were satisfied. A child born in wedlock to a German mother and American father generally did not acquire German citizenship through the mother.
For those affected by this historical gender discrimination, a different pathway may now be available.
Two German Citizenship Procedures: Section 30 and Section 5 StAG
Once the historical circumstances have been established, the next step is determining the appropriate German citizenship procedure.
| Section 30 StAG | Section 5 StAG | |
| Purpose | Confirms German citizenship that already exists | Grants citizenship denied by historical gender discrimination |
| Typical applicant | German at birth; may have retained it despite becoming American | Born in wedlock to a German mother and non-German father before January 1, 1975, and descendants |
| Result | Certificate of German citizenship (Staatsangehörigkeitsausweis) | Acquisition of German citizenship by declaration |
| Deadline | None | August 19, 2031 |
Section 30 StAG: Determination of Existing German Citizenship
This procedure applies when a person acquired German citizenship at birth and may have retained it despite subsequently acquiring U.S. citizenship.
The German Federal Office of Administration (Bundesverwaltungsamt) examines the original acquisition of German citizenship and whether any subsequent event resulted in its loss. If German citizenship is confirmed, the applicant receives a certificate of German citizenship (Staatsangehörigkeitsausweis). There is no deadline for this procedure.
Section 5 StAG: Citizenship by Declaration
Section 5 of the German Nationality Act provides an opportunity to correct historical gender discrimination in German citizenship law.
One important group consists of children born in wedlock to German mothers and non-German fathers before January 1, 1975. Under the laws applicable at the time, these children generally could not acquire German citizenship through their mothers. Since August 2021, eligible individuals and their descendants have been able to acquire German citizenship through a declaration.
Key points:
- Birth date: For this pathway, the child directly affected by the discriminatory law must have been born after May 23, 1949, when Germany’s Basic Law entered into force.
- Other groups: Other categories of historical gender discrimination are also covered by Section 5 StAG.
- Deadline: Declarations must be submitted by August 19, 2031.
- No relocation or renunciation: Eligible applicants generally do not need to move to Germany, demonstrate German language proficiency, or renounce their American citizenship.
Why Understanding Historical U.S. Immigration Law Matters
At STENNER LAW, our practice focuses on German nationality law, particularly citizenship by descent, citizenship determination, and the correction of historical discrimination. Our firm is based in the United States, where many of the descendants of German immigrants and postwar families now live.
We do not practice U.S. immigration law. But a thorough understanding of historical American immigration and citizenship procedures is an essential part of our work. German citizenship cases involving U.S. naturalization cannot be properly evaluated by looking at German law alone.
Our expertise: connecting both legal systems
Our expertise lies in connecting these historical U.S. citizenship events with their consequences under German nationality law.
Being based in the United States gives Stenner Law a particularly relevant perspective on these cases. We regularly work with American families, U.S. government records, and the documentary challenges involved in reconstructing immigration and naturalization histories.
Your German Citizenship May Still Exist
For many people born in postwar Germany, the assumption that becoming American meant losing German citizenship deserves a closer examination.
The answer may depend on a naturalization application submitted decades ago, a parent’s acquisition of U.S. citizenship, or a Consular Report of Birth Abroad issued shortly after birth.
In some cases, German citizenship may have continued uninterrupted. In others, Section 5 StAG may now provide an opportunity to acquire citizenship that was denied under historical discriminatory laws.
Understanding the difference requires a careful examination of both German nationality law and the relevant U.S. citizenship history.
At STENNER LAW, we focus on German citizenship law and assist clients throughout the United States with German citizenship by descent, declaration, restoration and restitution cases.
At STENNER LAW, we are specialists in German citizenship for Americans with German roots. We speak both German and English, and we have lived in both countries, which means we understand not only the legal side of these cases but also the practical work of tracking down old documents on both sides of the Atlantic. If you think you may qualify, the fastest way to find out is to complete our pre-consultation screening questionnaire. Your answers help us determine whether a consultation with German attorney Christine Stenner is the right next step for your case.
You can also reach us at office@stennerlaw.com
Or call our office at (215) 770-9488
We will review the information and let you know whether your case appears to meet the basic requirements for a consultation.
About the author
Christine Stenner is a German attorney with 30 years of experience. She is admitted to practice German law in the United States and focuses exclusively on German citizenship law for clients living in the United States. At STENNER LAW, she assists applicants with restoring or reclaiming German citizenship through declaration, re-naturalization, and restitution-based applications.
