You (or the purchaser or transferee) must complete Form CBS-1, Notice of Sale, Purchase, or Transfer of Business Assets. Learn how to complete an Illinois Bill of Sale form with this concise guide, ensuring a legal transfer of ownership and documentation.The following are basic rules for proper and safe notarization: 1) Keep your notary seal in a safe place; 2) Do not notarize a signature unless the signer. Forms on this website are PDFs with fillable fields. Forms should be downloaded to your computer before filling in the fields. Signatures: The transferor must sign the form to indicate agreement. In certain cases, notarization may be required to validate the transaction. An asset purchase agreement is a written legal instrument that formalizes the purchase of a business or significant business asset.