Maine Uniform Investment Company Notice Filing (Form NF) is a filing requirement for investment companies doing business in the state of Maine. This form is used to provide notice of certain activities such as the offer and sale of securities, the sale of real estate, and the formation of a company. There are three types of Maine Uniform Investment Company Notice Filing (Form NF): Form NF-1 for corporations, Form NF-2 for limited liability companies, and Form NF-3 for partnerships. Each form must be filed with the Maine Office of Securities prior to doing business in Maine and must be renewed annually.