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.
If signed in another state, then a certified acknowledgment that the deed was signed in conformity to the laws of the state where the deed was signed is sufficient. Unlike a will, a New York deed does not need to be witnessed. Normally the grantor/seller is the only person who needs to sign the deed.