paraph

A flourish made after or below a signature, originally to prevent forgery.

In diplomatics, the figure formed by a flourish of a pen at the conclusion of a signature, formerly used as a precaution against forgers; the flourish.

To append a paraph to: hence, to sign, especially with the signer’s initials. Also paragraph.

A flourish made with the pen at the end of a signature. In the Middle Ages, this formed a sort of rude safeguard against forgery.

To add a paraph to; to sign, esp. with the initials.

A flourish made after or below one’s signature, originally to prevent forgery.

To add a paraph to; to sign, especially with one’s initials.

a flourish added after or under your signature (originally to protect against forgery)