A Foreign Corporation Certificate of Change of Business To Be Transacted In Delaware is a document filed with the Delaware Secretary of State that allows a foreign corporation to transact business in the state. The document must include the name of the foreign corporation, its state of incorporation, the address of its registered office in Delaware, and a statement of the nature of the business to be transacted in Delaware. There are two types of Foreign Corporation Certificate of Change of Business To Be Transacted In Delaware: the Certificate of Amendment and the Certificate of Authority. The Certificate of Amendment is used to change the name, address, or principal office of the foreign corporation or to add or delete a business purpose. The Certificate of Authority is used to register a foreign corporation to transact business in Delaware. Both documents must be signed by an authorized officer of the foreign corporation and accompanied by the requisite fee.