The trust accounting handbook is a practical guide created to assist attorneys to comply with recordkeeping standards for client trust accounts. Users will find practical instructions for compliance with the State Bar of California's regulations.Get Client Trust Handbook Form. In this guide, we will explore the importance of client trust accounts and provide an overview of how you should set up and maintain them. Contact the Office of Chief Disciplinary Counsel at (512) 453-5535, the Board of Disciplinary Appeals at (512) 475-1578 or txboda. Let's say you are filling out a deposit slip for five checks relating to three separate clients. As of November 1, 2018, California lawyers are subject to a new rule on safekeeping the property of clients and others: Rule 1.15. Selected excerpts are based on the "Handbook on Client Trust Accounting for California. Attorneys" reprinted with the permission of The California State Bar.