One of the mysteries of the English language finally explained.
An autograph signature, especially that of the sovereign, serving to authenticate a document.
Late Middle English. From sign + manual, in sense 1 probably after Middle French seing manuel, signe manuel; compare also post-classical Latin signum manuale, and earlier signum manus.
sign manual/ˌsʌɪn ˈmanjʊl//ˌsʌɪn ˈmanjʊəl/
In this article we explore how to impress employers with a spot-on CV.