Documentation of Sales definition
Using a bill of sale is the ideal way to go for artists because it allows one to include some essential terms of the sale, as well as keep a record of past sales. It is not enough to use a receipt or invoice because they permit only limited information of one’s sales. A bill of sale can include: the size and title of the art piece along with other identifying information, other additional items included in the sale (such as any matting or framework), the sale price, the sale date, certain instructions (such as maintenance concerns), and particular terms of the artwork agreement. If the artwork is a commission piece, the bill of sale should describe the terms of the commission agreement.