Royal sign-manual

The royal sign-manual is the signature of the sovereign, by the affixing of which the monarch expresses their pleasure either by order, commission, or warrant. A sign-manual warrant may be either an executive act (for example, an appointment to an office), or an authority for affixing the Great Seal of the pertinent realm. The sign-manual is also used to give power to make and ratify treaties. Sign manual, with or without hyphen, is an old term for a handwritten signature in general. It is also referred to as sign manual and signet.