noun
seal of approval; inspection stamp
A stamp or seal used to indicate that a document, product, or item has been inspected and approved. Common in official, business, and quality-control contexts.
この書類には検印が必要です。
This document requires a seal of approval.
検査が終わったら、検印を押してください。
After the inspection, please stamp the seal of approval.
Compound of 検 (inspection) and 印 (seal, stamp). The exact historical derivation is uncertain, but the meaning is transparent from its components.