First preserve the account notice with sender, date, time and complete content. Save the merchant account view, affected listings, visibility in search results, open orders and effects on messages, payments or payouts. Screenshots should be supplemented with exportable notices and saved files.
The terms in force at the time of the measure are important. Record their version, any notice of change and the rule identified by the provider. Add your listings, product data, communications with the provider, customer notices and third-party messages. Keep originals unchanged, work with copies and maintain a chronology.
If the measure is lifted, access to earlier data is a separate point for review. Article 4(3) mentions personal and other data generated through use of the service before the measure took effect. The P2B Regulation does not replace data protection rules. For the complaint, describe precisely which data and functions are no longer reachable in practice.