Required elements for a document to be an insurable Deed of Trust: a. Must be in writing. b.This modification of promissory note, deed of trust, security agreement and fixture filing, assignment of leases and other loan documents. In a home loan transaction, the lender commonly requires the borrower to sign a mortgage or a deed of trust, along with a promissory note. The trick: showing the servicer that the other borrower (deceased or divorced and out of the picture) does not need to sign docs or participate in the process. A Deed of Trust is typically used in combination with a Promissory Note or Mortgage Agreement which sets out the amount and terms of the loan agreement. In addition to recording this Deed. The trick: showing the servicer that the other borrower (deceased or divorced and out of the picture) does not need to sign docs or participate in the process.