Evidence needs a job
A document is useful because of the point it proves, not because it exists.
Use a stable reference such as E1, E2 or CS1 and keep it consistent across the complaint, chronology and any later challenge. If a 40-page document matters because of one paragraph, record the page or section.
Editable template
Evidence index
Use one row per document, call, screenshot, statement or other record.
How to edit it: replace everything in square brackets with your own details. If a bracketed paragraph does not apply, delete it before sending.
What not to do
Do not turn the evidence index into argument.
“Email proves they are corrupt” is not a useful evidence description. “Email confirms the order was accepted on 3 March” is. Let the complaint explain the conclusion drawn from the evidence.
Official & related guidance
Check the route that applies to your situation.
Check the linked guidance before sending. Rules, complaint stages and time limits can differ by sector.