Keep a complete response file that a later reviewer can follow without reopening chat threads or inboxes. The record should show what the authority requested, what product population was in scope, which law and economic-operator role applied, what evidence was sent, what was withheld as unrelated or privileged, what corrective action was decided, and the outcome: no finding, further request, voluntary measure, authority-ordered measure, customs release, continued hold, refusal, appeal, or verified closure.
Use the evidence record for future authority requests, distributor questions, marketplace reviews, customs holds, insurance questions, and product changes. Reopen it when the product changes materially, a supplier changes, a test report is superseded, new incident data arrives, the Article 4 contact changes, or an authority asks a follow-up question.