An ombudsman or public advocate is usually appointed by the government or by parliament, but with a significant degree of independence, who is charged with representing the interests of the public by investigating and addressing complaints of maladministration or a violation of rights. In some countries an Inspector General, Citizen Advocate or other official may have duties similar to those of a national ombudsman, and may also be appointed by a legislature. Below the national level an ombudsman may be appointed by a state, local or municipal government. Unofficial ombudsmen may be appointed by, or even work for, a corporation such as a utility supplier, newspaper, NGO, or professional regulatory body.