Development of the banknote began in the Tang Dynasty during the 7th century, with local issues of paper currency, although true paper money did not appear until the 11th century, during the Song Dynasty.
A contract typically does not have to be notarized. A notary public (or simply notary) provides an acknowledgment that the signature appearing on the document is that of the person whose signature it purports to be. There is a requirement that some documents be notarized, such as a real property deed.
What is a Contract for Deed? A Contract for Deed (or Land Contract) is a contract for the purchase of real property (real estate) in which the seller retains the deed (title) to the property until the purchaser makes payments in installments equal to the agreed upon purchase price.