certificate; authorization; certified document
A formal document that certifies or authorizes something, often with an official seal. Can be used literally for a signed paper or figuratively for an endorsement.
See also: お墨付き
With this certificate, it means you have been officially authorized.
Figurative use: an endorsement or approval, often from an authority or respected person. Frequently used in the phrase お墨付きをもらう (to get the seal of approval).
It's a project that has the president's seal of approval.
paper with a shogun or lord's signature
Historical term: originally referred to a document bearing the signature or seal of a shogun or feudal lord, granting authority or permission.
See also: お墨付き
In the Edo period, a sumitsuki was an important document that showed the shogun's authority.