This publication provides a concise explanation of the rules and concepts of lawyer professional responsibility and liability in California. Analysis includes the applicable statutes, California Rules of Professional Conduct, caselaw, and bar association opinions that govern attorney conduct and liability. Discussed are the duties to uphold the integrity of the legal profession and administration of justice, as well as the duties to prospective clients. Additional analyses include formation and ending of the attorney-client relationship, providing legal services, fee disputes, and client trust accounting. Also included is law firm management and advertising legal services, mandatory reporting to the California State Bar, and the attorney discipline process.