noun, noun or participle which takes 'suru', transitive verb
proof; verification; certification
Broadly covers proving a fact, verifying something, or issuing official certification. Used as both a noun and a suru-verb.
身分を証明する書類を見せてください。
Please show me a document that proves your identity.
この書類は住所の証明になります。
This document serves as proof of address.