The Bill of Sale is a document that is used to sell/transfer ownership of assets from one person/entity (e.g., revocable trust, LLC, S-Corp, C-Corp) to a trust. The seller does not necessarily have to be you, anyone can sell assets to your trust.
A list of all assets should be created and attached to the Bill of Sale. This list will be called “Exhibit A”. This document requires notarized signatures and should be kept in your trust book.