Builder's signature Initials Images of signatures manu propria (m.p.) Memorial to the 56 Signers of the Declaration of Independence, includes depicted signatures Monogram Round-robin (document), a signed document where the signatures are arranged in a circle Royal sign-manual Shakespeare's handwriting Signum manus Tughra Huaya References External links Why Do We Sign For Things? A Rabbi, A Lawyer And A MasterCard Exec Explain NPR / Planet Money History of signatures at Slate What is Signature? Signature of 100 famous people (video on YouTube) Authentication methods Identity documents Writing Biometrics Articles containing self-references Personal identification Names