Maine Amended Application For Authority To Do Business is a document filed by a business entity to the Maine Secretary of State's Office in order to amend its authority to do business in the state of Maine. It is used to update the information on the original Certificate of Authority or Application for Authority to do business in the state of Maine. There are two types of Maine Amended Applications for Authority to do Business: Form BD-1 and Form BD-1A. Form BD-1 is used by a business entity to amend its Certificate of Authority or Application for Authority to do business in the state of Maine. This form allows a business entity to make changes such as updating the entity’s name, its address or its registered agent in the state. Businesses must file this form in order to maintain their authority to do business in the state. Form BD-1A is used by a business entity to amend its Certificate of Authority or Application for Authority to do business in the state of Maine due to a change in its legal structure. A business entity may need to file this form if it has changed its legal structure from a corporation to a limited liability company, or from a limited liability company to a corporation. This form must be completed and filed with the Maine Secretary of State in order to update the entity’s legal structure.