Signature vs Undersigned – What’s the difference?

As nouns the difference between signature and undersigned is that signature is a ’s name, written by that person, used to signify approval of accompanying material, such as a legal contract while undersigned is the person or those people, mentioned in a document, whose names and signatures appear at the end. As adjectives the difference between signature and undersigned is that signature is distinctive, characteristic indicative of identity while undersigned is (of a document) having signatures at the end or bottom.