Under-signatures are commonly used in legal documents and contracts to indicate the signatories who have signed the document underneath their respective signatures. Synonyms for under-signatures include undersigned, undersigning parties, signers, signatories, parties to the agreement, and signatory parties. These terms are often used interchangeably when referring to the individuals who have signed a particular document. The term "subscriber" can also be used to describe someone who signs a contract or agreement. It is important to use language that is clear and concise to ensure that the meaning of legal documents is easily understood by all parties involved.