Genealogical research succeeds by cross-referencing multiple independent sources. Every record repository has distinct evidentiary strengths, preservation standards, and access restrictions that determine its reliability.
| Record Repository | Primary Documentation Found | Verification Reliability | Common Archival Gaps |
|---|---|---|---|
| Vital Statistics Offices | Certified birth, marriage, and death certificates | 98% (Legal gold standard) | Strict state privacy windows (often 50, 75 years) |
| Social Security Death Index | Birth and death dates, last benefit zip code | 92% (Federal payroll data) | Truncated public access for post-2014 entries |
| Regional Newspaper Archives | Obituary notices, tributes, surviving relatives | 84% (Self-reported family data) | Unchecked typos in maiden names or dates |
| County Probate Court Filings | Last wills, asset distribution, heir lists | 95% (Sworn legal affidavits) | Requires in-person clerk retrieval or fees |
| Cemetery Registries | Interment plots, headstone inscriptions, dates | 89% (Physical spatial records) | Weathered stone text or lost unmapped plots |
