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.
1 If you are working with an attorney on the sale of the property, the attorney can notarize the deed.  In some states, the grantorâs signature must be witnessed, and the witness must sign the deed. Check with your county recorderâs office to determine whether this is necessary. It is not necessary in California.