An insurance company formed according to the laws of a foreign country (outside the United States). To legally sell insurance products in a U.S. state, an alien insurer must conform to that state's regulatory standards and obtain necessary approvals. Alien insurers may write business as admitted carriers (if licensed in the state) or as surplus lines carriers (if listed on the NAIC Quarterly Listing of Alien Insurers). Lloyd's of London syndicates are classified as alien insurers when writing business in the United States. Alien insurers must meet financial requirements, maintain trust funds or letters of credit in the U.S., and comply with applicable state regulations to maintain their eligibility.