An identity document used to verify a person's identity or name (e.g., driver's license, passport, My Number card).
口座開設の際には本人確認書類の提示が必要です。
You need to present an identity document when opening an account.
宅配便の受け取りに本人確認書類を見せてくださいと言われた。
I was asked to show ID when receiving the delivery.
海外旅行ではパスポートが最も重要な本人確認書類だ。
A passport is the most important identity document for traveling abroad.