cosignatory

Speech parts

1. cosignatory - Noun

2. cosignatory - Adjective

3. cosignatory - Adjective Satellite

one of two or more signers of the same document (as a treaty or declaration)

signing jointly with others

Source: WordNet

signatory signer guarantor endorser subscriber cosigner

signatory signer

cosified cosign cosignal cosigned promissory note cosignee cosigner