noun which may take the genitive case particle 'no'
signed; sealed; bearing a signature or seal
Legal term describing a document that has been signed or stamped with a seal, indicating formal approval or authentication.
有印の契約書が必要です。
A signed contract is required.
この書類は有印でなければ無効です。
This document is invalid unless it bears a seal.
Compound of 有 (possess, exist) and 印 (seal, stamp). The exact historical derivation is uncertain, but the term is conventionally used in legal contexts to mean 'bearing a seal or signature'.