Updated: June 2026

Case study · Bulgaria · Citizenship

How a Single Letter in a Surname AlmostCost Our Client Bulgarian Citizenship

Sometimes a single letter stands between a person and an EU passport—and it can erase genuine family ties. Natalya's great-grandfather was registered as "Stoyanov," while her mother, due to a Soviet registry clerk's error, was registered as "Stayanova." For Bulgaria's Ministry of Justice, these are formally two different families, and Bulgarian descent became uncertain. We explain step by step how we proved through the courts that Stoyanov and Stayanova are one surname and one family line.

Sergey EvdokimovSergey EvdokimovManaging Partner, BRIDGESReading time8 min readVerificationReviewed by an expert

This case is based on a real matter. The name and certain identifying details have been changed to protect confidentiality.

BRIDGES client story - How a Single Letter in a Surname Almost Cost Our Client Bulgarian Citizenship
Contents

Case at a glance

Situation, solution and outcome in seven lines

Client
Natalya, approximately 44 years old, Minsk
Ancestry
Great-grandfather, Bulgarian, surname "Stoyanov"
Problem
Mother registered as "Stayanova"—a scribe's one-letter error
Program
Bulgaria, citizenship by descent (Bulgarian ancestry, EU passport)
Risk
Ministry of Justice sees different families, descent not confirmed
Solution
Forensic linguistic examination and court ruling confirming surname identity
Result
Family relationship recognized, citizenship by descent granted

Client story

Client's Story

Where they started

Natalya had solid grounds for Bulgarian citizenship: her great-grandfather was Bulgarian with the surname Stoyanov, a recognizable and common Bulgarian name. Descent through such a line grants the right to an EU passport without residency or language examination—the matter seemed straightforward.

Why the standard route did not work

But a single letter undermined the entire structure. The great-grandfather's documents bore "Stoyanov," while her mother's birth certificate showed "Stayanova"—somewhere in a Soviet civil registry, a scribe wrote "a" instead of "o." For the family, this was an obvious clerical error; for the state, a formal discrepancy: Stoyanov and Stayanova appeared as different surnames, hence different families.

What BRIDGES had to solve

For citizenship by descent, the family line must be impeccable: each generation—ancestor, mother, applicant—must be connected by documents where everything matches. A one-letter gap between great-grandfather and mother meant the Ministry of Justice would not see an unbroken line and would not recognize Natalya's Bulgarian ancestry.

Why a standard answer would not do

Natalya approached BRIDGES, understanding that arguing with the state "but it's obviously a clerical error" would be useless—she needed official, legal proof that Stoyanov and Stayanova are the same surname and thereby restore the line broken by a single letter.

My entire right to a Bulgarian passport rested on my great-grandfather Stoyanov—but in my mother's documents it says "Stayanova," with an "a." Some clerk made a mistake, and for the state, these are different families! I thought one letter meant everything was lost. Sergey didn't argue "but it's obviously an error"—he did it properly: a linguistic examination and the court officially recognized that Stoyanov and Stayanova are the same surname. The line was restored, and our descent was accepted.

Natalia, 44 · Natalya, by her great-grandfather's ancestryThe name and certain identifying details have been changed to protect confidentiality.

What Was at Risk

What Was at Risk

Citizenship by descent requires an impeccable family line where everything in every document aligns. A scribe's one-letter error—"Stayanova" instead of "Stoyanov"—formally turns relatives into different families. Telling the state "but it's obviously a clerical error" verbally is pointless: official confirmation of identity is required.

The Ministry of Justice viewing Stoyanov and Stayanova as different families;

  1. 01The family line breaking between great-grandfather and mother;
  2. 02Bulgarian descent formally not being confirmed;
  3. 03The argument "this is obviously a clerical error" not being accepted;
  4. 04Genuine family relationship being negated by a single letter.

The logic of the solution

How the matter progressed: from checks to result

The chart is built from the facts of this matter and shows the logic of the work without decorative or unverified data.

  1. 01
    Stage 1

    We recognized that oral arguments do not work here. First, we honestly assessed the situation: arguing "this is obviously a typo" in correspondence was futile—the state required a formal fact, not common sense. This determined our strategy: not to dispute but to obtain official confirmation of surname identity acceptable to the Ministry of Justice.

  2. 02
    Stage 2

    We compiled evidence of the typographical error. To demonstrate that "Stayanova" was a distortion of "Stoyanov" rather than a different surname, we collected documents tracing the same family: records, addresses, kinship connections, and alternative spellings. The challenge was to present the facts so the discrepancy read as a scribe's error, not as coincidental different lineages.

  3. 03
    Stage 3

    We conducted forensic linguistic expertise. Key step: we engaged expert analysis that professionally established that "Stoyanov" and "Stayanova" are variants of one surname, with the substitution of "o" for "a" being a typical error in phonetic transcription. The challenge was ensuring the expertise was not merely an "opinion" but a substantiated conclusion upon which the court could rely.

  4. 04
    Stage 4

    We obtained a court decision on surname identity. Based on evidence and expertise, we achieved an official court ruling: "Stoyanov" and "Stayanova" are recognized as one surname belonging to one family. This converted an "obvious typo" into an established legal fact binding on the state.

  5. 05
    Stage 5

    We restored the unbroken genealogical line. With the court decision in hand, the gap between great-grandfather and mother disappeared: the great-grandfather—mother—Natalia line became unbroken and documentary flawless. We completed the remaining generations through civil registry offices to ensure the entire line cohered without a single discrepancy.

Takeaway. Conclusion: in descent cases, one letter breaks the line, and the issue to be fixed is the identity itself, not a dispute about it. Forensic linguistic expertise and a court decision convert an "obvious typo" into an established fact.

How we resolved the issue

How we resolved the issue

The work was split into verifiable stages so that every conclusion rested on documents.

  1. 01

    Stage 1

    We recognized that oral arguments do not work here. First, we honestly assessed the situation: arguing "this is obviously a typo" in correspondence was futile—the state required a formal fact, not common sense. This determined our strategy: not to dispute but to obtain official confirmation of surname identity acceptable to the Ministry of Justice.

  2. 02

    Stage 2

    We compiled evidence of the typographical error. To demonstrate that "Stayanova" was a distortion of "Stoyanov" rather than a different surname, we collected documents tracing the same family: records, addresses, kinship connections, and alternative spellings. The challenge was to present the facts so the discrepancy read as a scribe's error, not as coincidental different lineages.

  3. 03

    Stage 3

    We conducted forensic linguistic expertise. Key step: we engaged expert analysis that professionally established that "Stoyanov" and "Stayanova" are variants of one surname, with the substitution of "o" for "a" being a typical error in phonetic transcription. The challenge was ensuring the expertise was not merely an "opinion" but a substantiated conclusion upon which the court could rely.

  4. 04

    Stage 4

    We obtained a court decision on surname identity. Based on evidence and expertise, we achieved an official court ruling: "Stoyanov" and "Stayanova" are recognized as one surname belonging to one family. This converted an "obvious typo" into an established legal fact binding on the state.

  5. 05

    Stage 5

    We restored the unbroken genealogical line. With the court decision in hand, the gap between great-grandfather and mother disappeared: the great-grandfather—mother—Natalia line became unbroken and documentary flawless. We completed the remaining generations through civil registry offices to ensure the entire line cohered without a single discrepancy.

  6. 06

    Stage 6

    We submitted the file to the Ministry of Justice with the gap eliminated. From 2026, descent is confirmed directly through the Ministry of Justice, and we submitted a file where the court decision closed the main risk. Natalia's Bulgarian roots were accepted: a single letter no longer broke the line because surname identity was officially established.

Expert comment

In such cases, I am always struck by how one letter determines the fate of a passport. Natalia had solid grounds—great-grandfather Stoyanov, a Bulgarian. Everything hinged on her mother being registered as "Stayanova" with an "a". A scribe made an error a hundred years ago, but a person suffers now. The main mistake is approaching the state and proving verbally: "well, this is obviously a typo." That does not work: a formal fact is required. I proceeded differently: I collected evidence, conducted forensic linguistic expertise proving Stoyanov and Stayanova are one surname, and obtained a court decision confirming their identity. After that, the line from great-grandfather to Natalia became unbroken again. I always tailor the approach to the specific situation—and here the route ran not through dispute but through court. One letter no longer cost her an EU passport.

Sergey Evdokimov, Managing Partner, BRIDGESSergey EvdokimovManaging Partner, BRIDGES

Outcome

What the client received

What was required
How we proceeded · Result
Eliminate surname discrepancy
evidence of typographical error · discrepancy explained
Establish surname identity
forensic linguistic expertise · one surname confirmed
Make the fact binding
court decision · identity legally established
Confirm descent
unbroken line to Ministry · citizenship recognized
Confirm descent
unbroken line to Ministry · citizenship recognized

What existed: the client's great-grandfather, a Bulgarian, was registered as "Stoyanov," while her mother, due to a scribe's error, as "Stayanova," and the Ministry of Justice saw different families. What we did: rejected verbal disputes in favor of formal fact; compiled evidence of the typographical error; conducted forensic linguistic expertise on surname identity; obtained a court decision that Stoyanov and Stayanova are one surname; restored the unbroken line and submitted the file to the Ministry of Justice. What the client received: recognized kinship and Bulgarian citizenship by descent.

Practical takeaway

What matters in a similar situation

  • Conclusion: in descent cases, one letter breaks the line, and the issue to be fixed is the identity itself, not a dispute about it. Forensic linguistic expertise and a court decision convert an "obvious typo" into an established fact.
  • Natalia received an EU passport, which one letter nearly cost her—because we officially proved that Stoyanov and Stayanova are one lineage.

FAQ

Questions people ask in a similar situation

01Can an error in a single letter of a surname prevent citizenship?

Yes. For citizenship by descent, the genealogical line must be documentary flawless. A letter discrepancy formally makes relatives different families, and it must be officially remedied.

02How to prove that different name spellings represent one surname?

Through forensic linguistic expertise and a court decision establishing surname identity. This transforms an "obvious typo" into an established legal fact binding on the state.

03Why cannot one simply explain that it is a typographical error?

The state requires a formal fact, not common sense. Oral arguments in correspondence do not restore a broken genealogical line—official confirmation of identity is required, such as a court decision.

04What is forensic linguistic expertise?

A professional opinion establishing that different spellings refer to one surname and the discrepancy represents a typical recording error. Courts rely on this opinion when establishing surname identity.

05Is residence or language proficiency required for citizenship by descent?

No. Applicants claiming citizenship by descent are exempt from residence requirements and language examinations. The key is proving ancestral roots and an unbroken genealogical line without gaps in names and surnames.

06Does a surname error break the line to Bulgarian roots?

We will formally establish surname identity: gather evidence of the typographical error, conduct forensic linguistic expertise, and obtain a court decision to restore the genealogical line and confirm descent.

About the author

Sergey Evdokimov

Author: Sergey Evdokimov

Managing Partner, BRIDGES

As Founder and Managing Partner of BRIDGES, I am responsible for the firm's strategy and personally lead its most complex client matters, including cases in which citizenship or residence decisions require a strategic view and consideration of capital.

I begin by defining the objective: the outcome the client needs, the facts that affect the choice, and the matters that require further review. I then establish the available directions, the sequence of work, and the key decision points.

Once the strategy has been agreed, I oversee the BRIDGES team's key decisions and remain involved at the stages that shape the course of the matter. The purpose is to give the client a clear rationale for the chosen direction and a precise understanding of the next steps.

Prepared on the basis of BRIDGES practice and reviewed by a subject-matter expert.

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Anna KovalevskayaHead of Legal, BRIDGES
Anna Kovalevskaya, Head of Legal, BRIDGES

Names and certain details have been changed to protect client confidentiality. The result described reflects one specific situation and is neither a public offer nor a guarantee of a similar outcome. Programme terms are stated as of 2026 and may change - please confirm current parameters with a BRIDGES consultant.