This is a Model Subordinate Mortgage Form. A trust amendment is a legal document that modifies the terms of an existing trust.Specifically, it is used to make changes to a revocable living trust. Lender or Servicer ("Lender"):. Changes of ownership may or may not affect your property taxes depending on whether the conveyance is considered a transfer of ownership. Servicers may use HUD's Partial Claim documents for the. Mortgage Recovery Advance promissory note and mortgage or deed of trust. Modification or extension of a mortgage or deed of trust;. (b) The claimant may commence a proceeding to obtain payment of a claim against the trust in a court where the trustee is subject to jurisdiction. For a complete list of forms, visit the State Court Administrative Office website, and select one of these categories: Numerical Index Probate Court Forms.