Rule 7. Pleadings Allowed; Form of Motions and Other Papers

(a) Pleadings. Only these pleadings are allowed:

(1) a complaint;

(2) an answer to a complaint;

(3) an answer to a counterclaim designated as a counterclaim;

(4) an answer to a crossclaim;

(5) a third-party complaint;

(6) an answer to a third-party complaint; and

(7) if the court orders one, a reply to an answer.

(b) Motions and Other Papers.

(1) In General. A request for a court order must be made by motion. The motion must:

(A) be in writing unless made during a hearing or trial;

(B) state with particularity the grounds for seeking the order; and

(2) Form. The rules governing captions and other matters of form in pleadings apply to motions and other papers.

U.S. Code