noun
death certificate
Official document certifying a person's death, used in legal and administrative contexts.
死亡証明書を役所に提出する必要があります。
You need to submit a death certificate to the municipal office.
死亡届 is a death notification form submitted to report a death, while 死亡証明書 is the certificate issued afterward.
Compound of 死亡 (death) + 証明書 (certificate).