What confidentiality issue does Rule 1.9 address concerning former clients?

Rule 1.9 of the Model Rules of Professional Conduct addresses the issue of confidentiality in relation to former clients by establishing that a lawyer must obtain informed consent before using any information related to the representation of a former client. This rule emphasizes the importance of client confidentiality and the ethical obligation of lawyers to protect sensitive information even after the attorney-client relationship has ended.

The requirement for informed consent signifies that the former client has a right to control how their confidential information is used or disclosed. Additionally, this provision helps maintain the integrity of the legal profession and encourages clients to communicate openly with their attorneys, knowing that their information will remain protected.

The other choices do not align with the core tenets of confidentiality outlined in Rule 1.9. While some options might suggest that a lawyer can use or discuss information without consent, such practices would undermine the trust integral to the lawyer-client relationship and violate ethical obligations.