A trust amendment is a legally binding document designed to modify one or more provisions within your living trust. A trust amendment form is a legal document you use to make changes to your revocable trust.It isn't meant to change your trust document as a whole. Follow the steps below to complete your trust amendment form. Submit completed form to your County Recorder. Customer Service is available Monday thru Friday, a.m. First, you'll need to prepare and sign a new deed for the property. You'll usually need a grant form or quit claim form to transfer the deed. Check the applicable Rider boxes in the Short Form Deed of Trust. Insert the property description information and the address in the Short Form Deed of Trust.