A Declaration

1. A written or oral indication of a fact, opinion, or belief.
2. A list of items for various legal purposes, e.g. customs declaration.
3. The act or process of declaring.
4. (cricket) The act, by the captain of a batting side, of declaring an innings closed.
5. (law) In common law, the formal document specifying plaintiff's cause of action, including the facts necessary to sustain a proper cause of action, and to advise the defendant of the grounds upon which he is being sued.
6. (computing) The specification of an object, such as a variable or function, establishing its existence but not necessarily describing its contents.

(act or process of declaring): notice

(list of items for legal purposes): notice, statement

(written or oral indication): avowal, notice, statement