Translation guide
A document that verifies an item is genuine. In Japanese, this is often expressed with terms like 鑑定書 or 証明書, depending on context.
A document issued by an expert or authority confirming an item's authenticity, such as for artwork, antiques, or collectibles.
The most common term for a certificate of authenticity for art, antiques, and collectibles. It implies an expert appraisal.
この絵には鑑定書が付いています。
This painting comes with a certificate of authenticity.
Literally 'authenticity certificate'. More formal and explicit, often used in legal or high-value transactions.
真贋証明書を発行してもらえますか？
Can you issue a certificate of authenticity?
A card or document from the manufacturer or retailer proving a luxury item (e.g., handbag, watch) is genuine.
Used for luxury goods to certify they are authentic, not counterfeit. Often issued by the brand or authorized dealer.
このバッグには正規品証明書が同梱されています。
This bag includes a certificate of authenticity.
A more casual term meaning 'genuine item certificate'. Common in online resale markets.
本物証明書付きの時計を購入しました。
I bought a watch with a certificate of authenticity.
A document verifying that an autograph or piece of memorabilia is genuine, often from a third-party authenticator.
Commonly used for autographs and sports memorabilia. Combines 'appraisal' and 'certificate'.
サイン入りユニフォームに鑑定証明書が付いています。
The signed jersey comes with a certificate of authenticity.
A generic certificate of authenticity when the specific type of item is not important or is understood from context.
A formal, all-purpose term for a certificate of authenticity. Suitable for legal or official documents.
真正証明書がないと返品できません。
You cannot return it without a certificate of authenticity.
A descriptive phrase meaning 'a document certifying that it is genuine'. Used when a specific term is not known.
本物であることの証明書を提示してください。
Please present a certificate of authenticity.
鑑定書 (kanteisho) implies an expert appraisal and is typical for art/antiques. 証明書 (shomeisho) is a broader term for 'certificate' and is used in compounds like 真正証明書. For luxury goods, 正規品証明書 is common.
If you're unsure which term to use, you can say 「本物であることを証明する書類」(a document proving it's genuine). This is universally understood.