证明商标也称保证商标，指由对商品或服务具有检测和监督能力组织所控制，而由其以外的人使用在商品或服务上，用以证明该商品或服务的原产地、原料、制造方法、质量、精确度或其他特定品质的商品商标或服务商标。证明商标是证明与保证该商标的商品或服务具备特定品质。

A certification mark on a commercial product often indicates the existence of an accepted product standard and a claim that the manufacturer has tested the product to verify compliance with that standard. The specific specification, test methods, and frequency of testing are published by the standards organization. Certification listing does not necessarily guarantee fitness for use.