Final answer:
An insurer formed under the laws of a place outside the United States is known as an Alien insurer. These insurers are incorporated and headquartered in another country, differing from domestic and foreign insurers which are based within the U.S.
Step-by-step explanation:
An insurer that is formed under the laws of any place outside the United States is referred to as a C. Alien insurer. These insurers are eligible to do business in the U.S. but are not U.S.-based companies. They have their headquarters and are incorporated under the laws of another country. This is different from a domestic insurer, which is an insurance company that is incorporated and operates in the state in which it is domiciled. A foreign insurer refers to an insurer that is incorporated in one state of the U.S. but operates in another state. An international insurer, though not a technical term used in the insurance industry, would generally imply an insurer that operates in multiple countries, potentially including the U.S.