Crossword clue: one who signs a treaty or public document along with others or another; as, the cosignitaries of the treaty of berlin.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
Signing some important public document with another or with others; as, a treaty violated by one of the cosignitary powe