registered seal certificate; seal-registration certificate
An official document issued by a municipal office certifying that a registered personal seal (印鑑) is genuine. Often required for important contracts, real estate transactions, or company registration.
When purchasing real estate, a registered seal certificate is required.
市役所で印鑑証明書を発行してもらった。
I had a seal-registration certificate issued at the city office.
Compound of 印鑑 (seal) + 証明書 (certificate). The term is straightforward and modern, with no obscure historical derivation.