The document typically used with a CalVet loan is called a "Deed of Trust." This document is a legal instrument that secures the repayment of the loan by providing the lender with an interest in the borrower's property as collateral. In the case of a CalVet loan, the California Department of Veterans Affairs (CalVet) provides financing to eligible veterans for the purchase of homes in California, and the Deed of Trust is used to secure the loan against the purchased property.