A proper bill of sale usually contains the following items:

• Date of purchase.
• Name and contact information of seller and buyer.
• Amount paid.
• Description of what is being sold.
• Guarantee that the seller has the right to sell the item or property.
• Any guarantees, representations, warranties, or stating the item is sold as is.
• Signature of buyer.

Bear in mind that some states have requirements for notarization. To get more details on a typical bill of sale you can visit https://www.legalmatch.com/law-library/article/bill-of-sale-laws.html

The Vidadocs Bill of Sale covers you in all categories and is available for free.