Proof of use

Proof of use is evidence that a trademark is actually being used in the marketplace for the goods or services it protects. It helps show that the trademark is not just registered on paper, but is actively connected to real commercial activity. Typical examples include product labels, packaging, tags, screenshots of online shops, advertisements, brochures, catalogues, invoices, or website pages where the mark is clearly shown together with the relevant product or service. The strongest evidence usually shows the mark, the goods or services, the date, and a real commercial context. Proof of use requirements differ by country. In the United States, trademark owners often need to submit a “specimen” showing how the mark is used in commerce — for example a product label, packaging, or a website sales page. The USPTO describes a specimen as proof of what consumers see in the marketplace, and US registrations also require use-related maintenance filings after registration. In Germany, a trademark can generally be registered without proving use immediately. However, if the mark is not genuinely used within five years after registration, it can become vulnerable to revocation if challenged. The German Patent and Trade Mark Office states that a registration may be revoked and cancelled on request if the mark has not been used within five years after registration. For IP management, proof of use is important because it helps trademark owners keep registrations enforceable, prepare for renewals or challenges, and identify marks that may be at risk of cancellation due to non-use.