This relationship is fiduciary in nature and therefore demands utmost fidelity. 1 Advising or Assisting the Violation of Law Rule 1.3 Diligence Rule 1.4 Communication with Clients Rule 1.4.Definition. The attorney-client relationship is a legal bond that forms when a client engages an attorney to provide legal representation and advice. An attorney has the responsibility to not disclose who his client is unless he has permission from that client to the differ. Generally, the attorney-client relationship begins when both parties agree to it. This often happens through a formal engagement letter or contract. Attorney-client privilege is established when an individual asks a lawyer for legal advice in a confidential setting. Filling out or submitting the contact form does not create an attorney-client relationship. In California, attorney-client privilege is defined under Evidence Code Section 954. The content on this website is not guaranteed to be complete and up to date, but it has been used in this website in good faith.