Professional liability insurance—sometimes called malpractice insurance or errors and omissions insurance—is insurance that may be purchased by attorneys and law firms to pay the costs of defending legal malpractice claims, and the costs of settling such claims or paying the judgment awarded to a plaintiff on such a claim. Most states do not require attorneys to purchase professional liability insurance, but some states require attorneys who do not carry professional liability insurance to provide notice to their clients of that fact. Some states require attorneys to have their clients sign a written disclosure that the attorney does not have professional liability insurance.

In Wyoming, attorneys are not mandated by state law to carry professional liability insurance, also known as malpractice insurance or errors and omissions insurance. However, the Wyoming Rules of Professional Conduct for Attorneys at Law, specifically Rule 1.4, require attorneys to communicate effectively with their clients. This includes informing clients if they do not carry professional liability insurance when it is relevant to the client's decision to employ the attorney. While there is no specific statute in Wyoming that requires attorneys to have their clients sign a written disclosure regarding the lack of professional liability insurance, the ethical obligation under the Rules of Professional Conduct ensures that clients are made aware of this information as part of the attorney's duty to provide adequate communication. Attorneys in Wyoming may choose to purchase professional liability insurance to protect themselves against the financial impact of defending against legal malpractice claims and any potential settlements or judgments.