noun
insurance policy; certificate of insurance
Refers to the formal document that serves as proof of an insurance contract, such as a life or non-life insurance policy.
保険証書をなくしたので、再発行してもらった。
I lost my insurance policy, so I had it reissued.
契約時に保険証書の内容をよく確認してください。
Please check the details of the insurance policy carefully when signing the contract.
保険証 is a more general term for an insurance card or certificate, often used for health insurance cards. 保険証書 specifically refers to the formal policy document itself.
Compound of 保険 (insurance) and 証書 (certificate, deed).