The split tally was a technique which became common in medieval Europe, which was constantly short of money (coins) and predominantly illiterate, in order to record bilateral exchange and debts. A stick (squared Hazelwood sticks were most common) was marked with a system of notches and then split lengthwise. This way the two halves both record the same notches and each party to the transaction received one half of the marked stick as proof. Later this technique was refined in various ways and became virtually tamper proof. One of the refinements was to make the two halves of the stick of different lengths. The longer part was called stock and was given to the party which had advanced money or (other items) to the receiver. The shorter portion of the stick was called foil and was given to the party which had received the funds/goods. Using this technique each of the parties had an identifiable and tamper-proof record of the transaction. (via Tally stick - Wikipedia, the free encyclopedia)

The split tally was a technique which became common in medieval Europe, which was constantly short of money (coins) and predominantly illiterate, in order to record bilateral exchange and debts. A stick (squared Hazelwood sticks were most common) was marked with a system of notches and then split lengthwise. This way the two halves both record the same notches and each party to the transaction received one half of the marked stick as proof. Later this technique was refined in various ways and became virtually tamper proof. One of the refinements was to make the two halves of the stick of different lengths. The longer part was called stock and was given to the party which had advanced money or (other items) to the receiver. The shorter portion of the stick was called foil and was given to the party which had received the funds/goods. Using this technique each of the parties had an identifiable and tamper-proof record of the transaction. (via Tally stick - Wikipedia, the free encyclopedia)