Documenting a system no one fully understands: Mark the page as "Draft -- Partially Documented" and list known unknowns explicitly: "The retry logic in the payment service is not fully documented. Contact [person] for details." Incomplete documentation with clear gaps is better than nothing.
Page for a deprecated system: Set status to "Deprecated." Add a banner at the top: "This system is deprecated. [Replacement system] should be used for new work. This page is maintained for historical reference and to support the remaining migration." Link to the replacement page.
Onboarding guide that changes frequently: Structure as a checklist with links rather than inline content. When linked pages update, the onboarding guide stays current without editing. Add a "Last verified by a new hire" date based on when someone last followed the guide end to end.
Cross-team process (multiple owners): List each team's responsibilities in a RACI table (Responsible, Accountable, Consulted, Informed). Each team section has its own owner for that content. The page-level owner is responsible for the overall structure and cross-references.
Sensitive information (credentials, internal URLs): Do not put credentials in wiki pages. Reference the secrets manager or vault and provide the path/key name. For internal URLs, note the VPN or access requirements.
Long page that covers many topics: Split into a hub page with brief summaries and links to child pages. The hub page is the landing page; child pages have the detail. Keep the hub page under 2 screens of scrolling.