From filling out a change of trustee form to delivering notices to interested parties, the process of changing trustees can be complicated. The simplest way to make a change to a living trust is with a trust amendment form.A living trust amendment allows you to make changes to an existing trust. If you receive a Change of Ownership Statement (COS) in the mail, you must complete and return it to the Assessor Department within 90 days to avoid penalties. 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. Property Document Forms AB1466 - Restrictive Covenant Modification Policy and Cover Page Assessor Department - Preliminary Change of Ownership Report Form. Said Deed of Trust as herein modified shall constitute one Deed of Trust.