TRUST DEED. Just as with a mortgage this is a legal document by which a borrower pledges certain real property or collateral as guarantee for the repayment of a loan. However, it differs from the mortgage in a number of important respects. For example, instead of there being two parties to the transaction there are three. There is the borrower who signs the trust deed and who is called the trustor. There is the third, neutral party, to whom trustor deeds the property as security for the payment of the debt, who is called the trustee. And, finally, there is the lender who is called the beneficiary, the one who benefits from the pledge agreement in that in the event of a default the trustee can sell the property and transfer the money obtained at the sale to lender as payment of the debt.