German Citizenship: Proving Identity (Step-by-Step Model)
The issue of "clarifying identity" (Identitätsklärung) is considered one of the most complex obstacles facing foreigners wishing to obtain German citizenship. The procedures usually begin before the administrative authorities and may eventually lead to the administrative courts.
The administrative judiciary, specifically the Federal Administrative Court (Bundesverwaltungsgericht), has affirmed that a naturalization applicant is obligated to prove their identity according to the requirements of the step-by-step model (Stufenmodell). This model consists of five essential stages:
- Presenting a passport;
- Providing a recognized passport substitute or another official identity document containing a photograph;
- Presenting other suitable official documents;
- Utilizing other means of evidence;
- Relying solely on the applicant's statements and assertions.
We have chosen to discuss this topic in precise detail in light of the provisions of the German Nationality Act and the established rules of the Federal Administrative Court, aiming to make this a highly useful guide for anyone seeking German naturalization to successfully prove their identity.
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| Proving identity when applying for German citizenship Proving Identity as a Requirement for Naturalization in Germany: What the Law and Courts Have Decided |
1. The Legal Basis: Why is Proving Identity a Fundamental Condition for Naturalization?
Under Section 10, Paragraph 1, Sentence 1, and Section 8, Paragraph 1 of the Nationality Act (Staatsangehörigkeitsgesetz - StAG), naturalization in Germany now explicitly requires, among other things, that the identity of the foreigner legally and habitually residing within the country's territory must be "clarified and evident."
The requirement to "clarify identity" serves the vital security interests of the Federal Republic of Germany and is the starting point for examining all other naturalization requirements.
While Section 16, Sentence 1 of the Nationality Act (StAG) stipulates that a new citizenship is granted to a specific person whose identity is established in the naturalization certificate, the public interest lies in preventing anyone from acquiring a completely new identity or an additional alias identity (Alias-Identität). Allowing such loopholes would enable individuals to engage in legal transactions using multiple identities and different official documents. Therefore, subjecting identity-related personal data to strict scrutiny is mandatory to ensure its authenticity.
Review the Federal Administrative Court's ruling (BVerwG 1 C 36.19, Judgment of September 23, 2020).
Determining the Foreigner's Identity: The Foundation for Assessing Other Conditions
Furthermore, determining a foreigner's identity is the foundation for assessing whether a series of other naturalization conditions are met. It represents a necessary prerequisite and an indispensable element of the mandatory "security check" stipulated in Section 10, Paragraph 1, Sentence 1, Number 5, and Section 11 of the Nationality Act (StAG). This includes the newly introduced naturalization obstacles under Section 11, Sentence 1, Number 1a and Number 3 of the StAG.
It is important to note that the law does not exempt refugees in Germany from identity determination and verification, even if they are legally recognized.
When is a Naturalization Applicant's Identity Considered "Clarified" and When is it Not?
A naturalization applicant's identity is considered "clarified" in the legal sense if the authority or court is convinced that the foreigner is correctly registered in their country of origin under the stated identity attributes (e.g., surname, first name, birth name, date of birth, place of birth, marital status).
To trigger an identity investigation, there must be factual indications raising doubts about the applicant's identity; the duty to investigate ends when the available data provides no justification for further inquiry. Justified doubts about a person's identity arise when suitable identity documents are missing or when forged documents are submitted.
2. Stages of Clarifying Identity as a Condition for Naturalization (The Step-by-Step Model)
Since the security interests of the Federal Republic of Germany regarding the necessity of establishing identity conflict with the naturalization applicant's guaranteed constitutional right to prove their identity, resolving this conflict requires a fair balancing within the framework of a "step-by-step examination", as established by the jurisprudence of the Federal Administrative Court (BVerwG 1 C 27.24, Judgment of December 18, 2025):
Stage 1: Presenting a Passport
Primarily and as a general rule, a naturalization applicant must prove their identity by presenting a valid passport. A passport, being an internationally recognized official document, contains a binding declaration under international law from the issuing state that the passport holder is one of its citizens. It also provides legally binding proof of other core identity data, such as the holder's name in Latin letters and Arabic numerals (in accordance with Item 3 of the international standards ICAO Doc 9303, Part 3, issued by the International Civil Aviation Organization).
Since only the state of which the foreigner is a national is legally authorized to determine the spelling of the name, the name recorded in the passport is legally binding. This passport is presented as (rebuttable) evidence that the bearer is the person named, described, and pictured therein, and that the data it contains matches the factual and legal situation of the bearer.
Moreover, an ICAO-compliant passport contains security features designed not only to ensure global compatibility of travel documents but also to detect forgery. Consequently, presenting a passport fulfills the legal purpose of clarifying identity reliably, comprehensively, and with a high degree of certainty.
Stage 2: Providing a Recognized Passport Substitute or Other Official Photo ID
If the naturalization applicant does not possess such a passport, and obtaining one is objectively impossible or personally unreasonable to expect from them, they can prove their identity in the "second stage" through these documents: a recognized passport substitute or another official identity document featuring a photograph (such as a personal ID card).
Stage 3: Presenting Other Suitable Official Documents
If the individual also lacks an official identity document from the second stage, and obtaining one is objectively impossible or personally unreasonable, they can prove their identity in the "third stage" using other suitable official documents. The prerequisite here is that when these documents were issued, the accuracy of the link between the person and the name was verified. This applies whether the documents include a photograph (e.g., a driver's license, an official work ID, or a military service book) or do not (e.g., birth certificates, residence certificates, or school records). It is worth noting that documents containing biometric features carry a higher evidentiary value than those without them.
Stage 4: Utilizing Other Means of Evidence
In the event the naturalization applicant possesses none of these official documents, and obtaining them is objectively or personally impossible, the foreigner may, in the "fourth stage," utilize other permitted means of evidence under Section 26, Paragraph 1, Sentences 1 and 2 of the Administrative Procedure Act (Verwaltungsverfahrensgesetz - VwVfG). This specifically includes informal documents and records suitable for proving personal data, as well as witness testimonies if necessary. However, it does not include an "affidavit" (sworn statement).
Stage 5: Relying Solely on the Applicant's Statements and Assertions
If the naturalization applicant is also unable to resort to other means of evidence within the meaning of Section 26 of the Administrative Procedure Act, their identity can exceptionally be considered established in the "fifth stage" based solely on their statements and assertions. This is conditional upon the naturalization authority being convinced of the truthfulness of the personal data based on a comprehensive assessment of the individual circumstances of the case and the entirety of the applicant's statements.
3. Applying the Developed Step-by-Step Model to Prove the Applicant's Identity
When applying the developed step-by-step model (Stufenmodell) to citizenship applications submitted by foreigners to prove identity, the administration or the court must consider the following points:
- The gradual acceptance of types of evidence and the comprehensive assessment of facts is the only way to effectively counter the severe risks of abusing the right to prove identity.
- To form an administrative or judicial conviction, a degree of certainty suitable for practical life is required—a degree that silences doubts without entirely excluding them. The evidence considered in Stages 1 to 5 must be internally consistent and align, within the overall assessment context, with the applicant's other statements. In this context, the evidentiary value of the submitted documents must be examined according to the circumstances of each case. Deficiencies in the civil registry and document system in the country of origin can undermine or even negate confidence in the document's authenticity or the integrity of its content. Doubts regarding content accuracy—and thus evidentiary value—can be raised even for a genuine passport if it is easy to obtain genuine passports with false data in the applicant's home country, or if professional forgery affects virtually every document in that state. If obtaining forged or falsely informative documents is common in the foreign country, or if documents are often genuine with real stamps and signatures but contain fake content, strict standards must be applied when evaluating the evidentiary value of the presented foreign official document.
- Transitioning from one stage to a subsequent (lower) stage is only permissible if the naturalization applicant is unable to prove their identity despite having fully fulfilled their duty to cooperate.
- The step-by-step model for clarifying identity, in its refined and developed version, complies with Article 3, Paragraph 1 of the Basic Law (Grundgesetz) regarding the principle of equality. It respects general equality by taking into account, at each stage, the potential "state of evidentiary necessity" (Beweisnot), thereby preventing the applicant from being placed in an unjustified worse legal position without sufficient objective justification.
4. Advice for Facilitating Identity Proof Procedures for Foreigners Seeking Naturalization
Make sure to demonstrate cooperation with the German administrative or judicial authorities regarding identity verification when applying for citizenship:
If a naturalization applicant lacks a passport as the primary means of proving identity in the first stage, they must prove that they have fulfilled the "duty to cooperate" (Mitwirkungspflicht). This means they have made sufficient, serious, yet unsuccessful attempts to obtain proof of identity from their country of origin.
The opportunity Germany provides to prove identity is available to cooperative naturalization applicants who find themselves in a "state of evidentiary necessity" (Beweisnot), up to the limits of "objective possibility" and "personal reasonableness." This could be due to their home countries lacking an effective civil registry system, authorities refusing to cooperate for reasons beyond the expatriate's control, or refugees fearing that mere "technical" communication with their home country's authorities might expose third parties (their relatives) to reprisals.
Based on protecting the future development of the individual as a fundamental prerequisite for human personality, the "general right of personality" enshrined in Article 2, Paragraph 1 in conjunction with Article 1, Paragraph 1 of the Basic Law (the German Constitution) dictates that naturalization applicants who are expected to remain permanently in Germany must be given a realistic opportunity to clarify their identity.
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