https://en.wikipedia.org/wiki/Indenture https://en.wikipedia.org/wiki/Indenture > The term comes from the medieval English "indenture of retainer"[1] — a legal

https://en.wikipedia.org/wiki/Indenture https://en.wikipedia.org/wiki/Indenture > The term comes from the medieval English "indenture of retainer"[1] — a legal contract written in duplicate on the same sheet, with the copies separated by cutting along a jagged (toothed, hence the term "indenture") line so that the teeth of the two parts could later be refitted to confirm authenticity https://en.wikipedia.org/wiki/Chirograph https://en.wikipedia.org/wiki/Chirograph > A chirograph is a medieval document, which has been written in duplicate, triplicate or very occasionally quadruplicate (four copies) on a single piece of parchment, with the Latin word chirographum (occasionally replaced by some other term) written across the middle, and then cut through to separate the parts.