Begin with the church’s own current documents
Find the dated statement of faith, constitution or bylaws, membership covenant, baptism and Communion policies, leadership qualifications, and denominational or network affiliations. Confirm that the document actually governs the body you are studying.
Read authority, Trinity, Christology, gospel, justification, and salvation before secondary customs. Then inspect baptism, Communion, polity, ministry, gifts, worship, and distinctive practices. Record what is explicit, what varies within the group, and what has no clear public position.
Silence means unknown—not agreement
Do not fill gaps from a pastor’s celebrity, musical style, political reputation, architecture, or the word Bible in the church name. If a statement omits spiritual gifts, eschatology, or the exact internal polity, mark the field as having no clear public position and look for a policy or teaching archive.
Compare a group’s own account first, then consult historic confessions, scholarly context, and responsible external assessment. Contested claims need both sides and a clear review date.