Preserve the original and challenged products in the condition in which they were actually offered. This includes packaging, labels, interfaces, product pages, advertisements, catalogues, prices and visible manufacturer information. Screenshots should show the URL, date and full page context.
Dated drafts, prototypes, construction stages, approvals, invoices, production material and advertising records help establish the original work. Keep traceable file versions. A summary created after the dispute does not replace the original development evidence.
Also document the launch date of both offerings, distribution channels, target audiences and known customer reactions. Record possible confusion with the wording, date and source of the report. Estimates of lost sales or recognition must remain separate from verifiable data.