Nounchief (of police); head (of office)

Nounstaff member; station employee; official

Nounstation (esp. a police station); office (e.g. tax office)

Nouninside a police station, fire station, tax office, etc.

Nounsigning ceremony (for a law, treaty, etc.)

Nounsignatory nation

Nounsignature specimen

Suru verb - special class, Transitive verbto sign (one's signature)

Nounsigner; signatory

Nounsigned book; autographed book

Noun, Suru verb, Intransitive verbadding one's signature and seal (to a document); signing and sealing

Nounsignature-collecting campaign