Genealogy: Frequently Asked Questions

Genealogy research in the United States spans a structured professional service sector with credentialing bodies, evidentiary standards, and legal consequences that affect probate, citizenship, inheritance, and medical history. The questions below address the operational structure of the field — its record systems, professional categories, regulatory context, and common research failure modes. The scope is national, covering federal and state-level record access, professional qualification frameworks, and evidence classification standards as they function in practice.

Where can authoritative references be found?

The primary federal repository is the National Archives and Records Administration (NARA), which holds hundreds of millions of records including decennial census schedules, military service and pension files, immigration manifests, naturalization records, and land patents. NARA maintains a dedicated genealogy research portal with catalog access and digitization schedules.

State-level vital records — birth, marriage, divorce, and death certificates — are administered by individual state vital records offices, which vary significantly in access policies and fee structures. The National Center for Health Statistics (NCHS) maintains a state-by-state reference listing each office's contact details and access rules.

The Board for Certification of Genealogists (BCG) publishes Genealogy Standards (second edition, 2019), the definitive professional reference for evidentiary requirements. The Genealogical Proof Standard described in that volume is the operative threshold for court-admissible and registry-acceptable findings. The Genealogy Authority Index aggregates references to record systems, professional bodies, and research frameworks relevant to this field.

How do requirements vary by jurisdiction or context?

Access rules for vital records differ by state statute. Eighteen states restrict birth certificate access to the registrant, immediate family members, or legal representatives, while a smaller group of states maintain open-access policies for records older than 100 years. Death certificates are generally more accessible than birth records, though access to cause-of-death fields may be restricted under state health privacy law.

For federal census records, NARA applies a 72-year restriction under 44 U.S.C. § 2108, meaning the 1950 census became publicly available in April 2022. Earlier schedules are fully open.

Hereditary society membership requirements — such as those for the Daughters of the American Revolution or the Society of Mayflower Descendants — impose their own documentary standards that exceed general research practice. These organizations require each generational link in a lineage to be documented to a threshold comparable to the Genealogical Proof Standard, rejecting findings that rely on unverified transcriptions or unsupported family tradition.

What triggers a formal review or action?

Formal review is triggered when genealogical findings are submitted in contexts with legal or institutional stakes:

1. Probate proceedings — Courts may require professionally certified lineage documentation when an heir is not named in a will or when intestate succession is disputed across multiple claimants.
2. Citizenship and nationality applications — The U.S. Department of State and U.S. Citizenship and Immigration Services (USCIS) require documentary proof of lineage for derivative citizenship claims, with specific evidentiary hierarchies for each record type.
3. Hereditary society submissions — Governing bodies conduct internal review of all lineage applications; errors in source citation or unsupported identity assumptions result in rejection and require supplemental documentation.
4. DNA-based paternity or kinship disputes — When DNA evidence enters legal proceedings, opposing parties may challenge chain of custody, testing methodology, or interpretation of results.
5. Tribal enrollment determinations — Federally recognized tribes administer their own enrollment criteria, which may require genealogical proof of descent from a specific base roll.

In each context, findings produced without adherence to recognized proof standards face heightened scrutiny.

How do qualified professionals approach this?

Professional genealogists operating under the BCG's Certified Genealogist (CG) credential or ICAPGen's Accredited Genealogist (AG) credential apply a structured research methodology described in the how genealogy works conceptual overview. The two credentials are not interchangeable: BCG credentialing evaluates written analytical skill and proof construction across record types, while ICAPGen accreditation is region- and record-type specific, covering geographic areas such as the U.S. Great Lakes region or specific state clusters.

Qualified practitioners distinguish between three source classifications — original, derivative, and authored narrative — and two information classifications — primary and secondary — before extracting evidence from any record. This source-information-evidence framework prevents a common analytical error: treating a derivative source (such as an index entry) as equivalent in reliability to the original register from which it was abstracted.

Research plans are documented in writing, specifying the research question, known facts, sources already consulted, and gaps to be addressed. This documentation standard serves both as quality control and as a reproducible record if findings are later reviewed or contested.

What should someone know before engaging?

Before commissioning professional genealogical research, the scope and legal purpose of the research should be clearly defined. A general family history project imposes different evidentiary thresholds than a probate lineage proof or a citizenship application. Cost structures vary accordingly: a single-generation lineage proof for legal purposes may require 8 to 20 hours of professional research at rates that BCG-certified practitioners typically list between $75 and $200 per hour, depending on record complexity and geographic scope.

DNA testing adds a parallel evidence stream but does not replace documentary research. Autosomal DNA testing identifies relatives across all ancestral lines within approximately 5 to 7 generations but cannot distinguish which specific ancestor is the source of a shared segment. Y-DNA testing traces only the direct patrilineal line and is used primarily for surname and migration pattern studies. Conflating the two methodologies produces unreliable conclusions.

Individuals should also confirm that vital records needed for the research are accessible under applicable state law before assuming availability.

What does this actually cover?

Genealogical research encompasses documentary, biological, and oral evidence used to identify, link, and analyze family relationships across generations. The documentary tier includes vital records, census schedules, military records, land and probate records, church registers, immigration files, and city directories. The biological tier includes autosomal, Y-chromosome, and mitochondrial DNA test results interpreted within a statistical and population genetics framework. Oral history and family tradition occupy an evidentiary category that requires corroboration from independent sources before it can support a formal genealogical conclusion.

The field does not cover genetic health diagnostics — that function belongs to clinical genetic counseling and licensed medical providers. Genealogical DNA analysis addresses kinship and ancestry; it does not produce medically actionable health risk assessments, which require separate clinical interpretation under a licensed provider.

Historically significant subject areas within the field include enslaved ancestry research (where records are fragmentary and require specialized methodology), Indigenous ancestry documentation, and immigrant-generation research requiring foreign archive access.

What are the most common issues encountered?

The single most consequential error in genealogical research is same-name conflation — treating two individuals with identical or similar names as a single person without independent corroborating evidence. This failure mode is especially prevalent in research involving common surnames in densely settled counties prior to standardized vital registration, which began in most U.S. states between 1900 and 1920.

Additional common issues include:

• Reliance on derivative sources without verification — Transcription errors in indexes, Soundex codes, and compiled databases are well-documented; original records must be consulted before conclusions are drawn.
• Unsupported date or place assumptions — Applying a birth year from one record to an individual in an unrelated record without confirming identity through corroborating evidence.
• Misinterpretation of DNA results — Treating a predicted relationship category (e.g., "2nd–3rd cousin") as a confirmed genealogical link without documentary support.
• Incomplete citation — Findings submitted without complete source citations cannot be verified or peer-reviewed and are typically rejected by hereditary societies and courts.

How does classification work in practice?

The three-axis classification framework — source, information, evidence — is the structural foundation of professional genealogical analysis. A source is classified as original (the artifact or record as created), derivative (a transcription, abstract, or index derived from an original), or authored narrative (a compiled account integrating material from multiple sources). A derivative source is not inherently unreliable, but its reliability depends on the fidelity of the abstraction process and must be checked against the original when possible.

Information within a source is classified as primary (provided by a person with firsthand knowledge of the event) or secondary (provided by someone without firsthand knowledge). A death certificate, for example, contains primary information about the death event but secondary information about the decedent's birthplace if the informant was a surviving spouse rather than a firsthand witness to the birth.

Evidence extracted from sources is classified as direct (explicitly answers the research question), indirect (requires inference combined with other evidence), or negative (the absence of an expected record entry, which can itself be informative). A finding supported only by direct evidence from a single source does not meet professional proof standards; corroboration across independent sources is required. This classification system is the analytical mechanism described in the BCG's Genealogy Standards and is applied consistently in professional-grade research regardless of the record type or time period under investigation.