Use anonymised detail, real structure, quantified outcomes, balanced risk language, and client permission. Log as a promotion with sign-off and expiry.
Structure
- Situation (anonymised) - Advice given (high-level, not replicable advice) - Outcome (quantified but in bands) - Caveat: past performance is not a guide - Client permission on file
Sign-off
Treat each case study as a financial promotion; expire after 12 months.