Cosigner — synonyms, definition

1. cosigner (Noun)

1 synonym
cosignatory
2 definitions

cosigner (Noun) — One of two or more signers of the same document (as a treaty or declaration).

cosigner (Noun) — A signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety).

2 types of
signatory signer