Signature

thumb|300px| John Hancock's signature is the most prominent on the [[United States Declaration of Independence and the Articles of Confederation. The name "John Hancock" or just "Hancock" has become a synonym for "signature" in the United States.]]

The first Ottoman tughra, Orhan (1326).|thumb|right A tughra (; ) is a calligraphic monogram, seal or signature of a sultan that was affixed to all official documents and correspondence. Inspired by the tamgha, it was also carved on his seal and stamped on the coins minted during his reign. Very elaborate decorated versions were created for important documents that were also works of art in the tradition of Ottoman illumination, such as the example of Suleiman the Magnificent in the gallery below.

legally binding signature executed by electronic means

thumb|upright=1.35|"B-A-C-H is beginning and end of all music", signed autograph document by [[Max Reger (dated 7 May 1912)]]An autograph is a person's own handwriting or signature. The word autograph comes from Ancient Greek (, autós, "self" and , gráphō, "write"), and can mean more specifically: a manuscript written by the author of its content. In this meaning the term autograph can often be used interchangeably with holograph. a celebrity's handwritten signature. Autograph collecting is the activity of collecting such autographs.

A '''''' (, ) is a Georgian calligraphic joined-up style signature, monogram or seal, originally used by the Georgian monarchs, queens consort, patriarchs, royalty and nobility, universally used since the early eleventh century.

The eIDAS Regulation (for "electronic IDentification, Authentication and trust Services") is an EU regulation with the stated purpose of governing "electronic identification and trust services for electronic transactions". It passed in 2014 and its provisions came into effect between 2016 and 2018.

Huaya ("flower seal"; ; ; , Vietnamese: , chữ Hán: ) are stylized signatures or marks used in East Asian cultures in place of a fully written signature. Originating from China, the huaya was historically used by prominent figures such as government officials, monks, artists, and craftsmen. The use of stamp seals gradually replaced the huaya, though they are still used occasionally in modern times by important people.

symbol on ancient manuscripts

personalized block of text appended to an email message, Usenet article, or forum post

entity providing digital certificates

album for collecting autographs

EU-compliant electronic signature