Treat this catalog label as a study topic in professional genealogy methods rather than a published exam blueprint. No issuer, exam format, or official assessment expectations are established here; confirm all administrative and membership details directly with the association. What follows teaches the core subject itself: the Genealogical Proof Standard, evidence classification, conflict resolution, and written proof arguments.
No published blueprint: what to actually study for this label
When no detailed credential outline is established, study the discipline's recognized methods. Professional genealogy rests on a small set of named concepts, and those concepts transfer to any assessment of genealogical reasoning.
Build your plan around the Genealogical Proof Standard, the source-information-evidence framework, citation practice, research planning, and written conclusions. These five areas cover how professionals reason, document, and communicate. Learn each concept's precise vocabulary, because the vocabulary forces distinctions: 'source' and 'evidence' are not interchangeable, and sloppy usage signals unfinished thinking.
Then practice application, not recall. Take one real ancestor and, on paper, classify every record you hold into the three layers, flag one conflict, and draft a short resolution. One completed cycle teaches more than rereading definitions, because the layers only become intuitive when you argue with your own assumptions about a familiar record.
Source, information, and evidence: the three analytical layers and why they must stay separate
A source is the physical or digital artifact; information is what the artifact states; evidence is what that information does to answer your specific question. Each layer is classified separately.
Sources divide into original, derivative, and authored. Information divides into primary, secondary, and sometimes indeterminable, based on how close the informant was to the event. Evidence divides into direct, indirect, and negative, based on whether the information answers your question outright, implies an answer, or suggests the answer only by its absence. The same document can hold multiple items of information classified differently.
Compare this with the common shortcut of ranking documents as 'strong' or 'weak' overall. A death certificate is a single source whose burial date may be primary information, whose birth details may be secondary from an uninformed informant, and whose value as evidence shifts with every question you ask. Layered classification lets one record be simultaneously reliable and unreliable, which is the correct conclusion.
Worked scenario: two birth years, one ancestor
A candidate facing conflicting birth dates on a census and a death certificate should not simply prefer the certificate; the decision turns on informant proximity and correlation.
Suppose a death certificate states a birth year of 1878, while the 1900 census states August 1876. The plausible mistake is to accept the certificate because it is official, later, and solemn-looking. That reasoning confuses formality with information quality. The certificate's birth data was reported at second hand, decades after the event, by a grieving relative whose knowledge is unknown.
The better decision is to identify the informant, then correlate additional independent items: the 1900 census month and year, a baptismal register, military draft papers, and family Bible entries. Suppose the informant was a daughter born in 1905 and the draft registration, whose age was reported by the subject himself, agrees with 1876. The weight shifts to 1876, and your written note explains why, informant by informant. That explanation, not the date itself, is the professional skill.
Worked scenario: proving a mother from indirect evidence
When no record names a mother outright, the candidate must build a proof from a chain of indirect evidence and resist citing only a derivative index or a published family history.
Suppose the question is the mother of Sarah, born about 1848, and the only convenient finding is an online index entry linking Sarah to a family. The plausible mistake is to stop there, citing a derivative index as if it were the record. Indexes can transcribe incorrectly, omit relationships, and hide the original's context. Citing the index also gives future researchers nothing to re-evaluate.
The better decision is to locate the underlying record, then assemble a chain: the father's will naming daughter Sarah, a guardianship order after his death naming the widow, a deed where the widow releases dower, and census households placing Sarah in that family across decades. Each item alone is indirect; correlated, they answer the question to a reasonable standard. Write the argument as an explicit chain, stating what each item does and cannot show.
Choosing what to trust: a source and evidence decision table
Trust is never a single judgment about a document type. Use a table that forces a separate decision at each layer, then record how the items correlate or conflict.
The table below contrasts how each classification behaves and what test to apply. Notice that no row is automatically 'best': an authored compiled genealogy may contain brilliant analysis and unmarked errors, while an original record may contain a clerk's outright mistake. The test column is where your work happens.
Recreate this table by hand once, then use it mentally on every new record. The habit of asking three separate questions, one per layer, prevents this analytical collapse, where a single label such as 'reliable' is pinned to an entire document and reused for every fact it touches.
| Classification | What it describes | Typical example | Test to apply |
|---|---|---|---|
| Original source | First physical recording of the event | Parish register signed by the officiant | Is the writing contemporary and by a participant or near-contemporary? |
| Derivative source | Copy, transcript, index, or database of another record | County marriage index on a website | Can I reach the original? What did the transcriber skip or misread? |
| Authored source | Narrative account built from other research | Published county history with family sketches | Are claims cited? Do named sources still exist and agree? |
| Primary information | Informant participated in or witnessed the event | A groom's own age on his marriage record | How did the informant know, and how soon after the event? |
| Secondary information | Informant reported the event at second hand | Daughter reporting her mother's birthplace at death | Would this informant plausibly know, and how long after? |
| Negative evidence | Absence that narrows the answer | No marriage entry in the likely parish records | Have I confirmed the record set should contain the event? |
Paper exercise: audit one ancestor and score yourself
Pick one ancestor and one research question. Build a three-column audit, resolve one conflict in writing, then score your work against a rubric before checking any new records.
Set up three columns: source classification, information classification, and evidence classification, one row per record you already hold. Add a fourth column for the informant where identifiable. Work from what you have, not from new searches, so the exercise measures your analysis rather than your luck in finding documents. Thirty to sixty minutes is usually enough for ten to fifteen rows.
Then write a 150 to 250 word proof paragraph answering your question, citing each row, and explicitly naming any conflict and its resolution. Score with this rubric: one point if every row has all three classifications; one point if informants are identified or marked unknown; one point if the paragraph states what indirect evidence does and does not show; one point if the conflict resolution names why one item outweighs another; one point if a reader could relocate every cited source from your citations alone. Five of five is the learning milestone to repeat on a second ancestor.
A preparation sequence and concrete readiness checks
Study the concepts first, apply them record by record second, and write conclusions third. Readiness means you can classify, correlate, and defend a conclusion without prompting.
A workable sequence: spend an early block learning the named vocabulary of the Genealogical Proof Standard and the three-layer framework from published professional standards texts; a second block applying classification to your own records across record types you rarely touch, such as land, probate, and court papers; a third block drafting proof arguments and research plans on paper, including one negative-evidence argument; and a final block revising citations until each one lets a stranger find the source.
Check readiness with observable tests, not scores alone. You are ready to move on when you can classify any unfamiliar record into all three layers in about a minute; when your written conflict resolutions name informants rather than document types; and when a peer reading your proof argument can restate your reasoning chain without asking you to fill gaps. Repeat the audit exercise on a fresh ancestor until five-of-five rubric results feel routine, which signals a stable habit rather than a memorized procedure.