Colo. R. Civ. P. 305

As amended through Rule Change 2024(7), effective April 4, 2024
Rule 305 - Service and Filing of Pleadings and other Papers
(a) Service: When Required. Except as otherwise provided in these rules, every order required by its terms to be served, every pleading subsequent to the original complaint unless the court otherwise orders because of numerous defendants, every paper related to discovery required to be served upon a party unless the court otherwise orders, every written motion other than one which may be heard ex parte, and every written notice, appearance, demand, filings on appeal, and similar paper shall be served upon each of the parties. No service need be made on parties in default for failure to appear except that pleadings asserting new or additional claims for relief against them shall be served upon them in the manner provided for service of summons in Rule 304.
(b) Making Service.
(1) Service under C.R.C.P. 305(a) on a party represented by an attorney is made upon the attorney unless the court orders personal service upon the party. A resident attorney, on whom pleadings and other papers may be served, shall be associated as attorney of record with any out-of-state attorney practicing in any courts of this state.
(2) Service under C.R.C.P. 305(a) is made by:
(A) Delivering a copy to the person served by:
(i) handing it to the person;
(ii) leaving it at the person's office with a clerk or other person in charge, or if no one is in charge, leaving it in a conspicuous place in the office; or
(iii) if the person has no office or the office is closed, leaving it at the person's dwelling house or usual place of abode with someone 18 years of age or older residing there;
(B) Mailing a copy to the last known address of the person served. Service by mail is complete on mailing;
(C) If the person served has no known address, leaving a copy with the clerk of the court; or
(D) Delivering a copy by any other means, including E-Service, other electronic means or a designated overnight courier, consented to in writing by the person served. Designation of a facsimile phone number in the pleadings effects consent in writing for such delivery. Parties who have subscribed to E-Filing, pursuant to Chief Justice Directive 06-02 have agreed to receive E-Service. Service by other electronic means is complete on transmission; service by other consented means is complete when the person making service delivers the copy to the agency designated to make delivery. Service by other electronic means or overnight courier under C.R.C.P. 305(b)(2)(D) is not effective if the party making service learns that the attempted service did not reach the person to be served.
(c) Service: Numerous Defendants. In any action in which there are unusually large numbers of defendants, the court, upon motion or of its own initiative, may order that service of the pleadings of the defendants and replies thereto need not be made as between the defendants and that any cross claim, counterclaim, or matter constituting an avoidance or affirmative defense contained therein shall be deemed to be denied or avoided by all other parties and that the filing of any such pleading and service thereof upon the plaintiff constitutes due notice of it to the parties. A copy of every such order shall be served upon the parties in such manner and form as the court directs.
(d) Filing; Certificate of Service. All papers after the initial pleading required to be served upon a party, together with a certificate of service, must be filed with the court within a reasonable time after service, but disclosures under Rule C.R.C.P. 316 and discovery requests and responses shall not be filed until they are used in the proceeding or the court orders otherwise.
(e) Filing with Court Defined. The filing of pleadings and other papers with the court as required by these rules shall be made by filing them with the clerk of the court, except that the judge may permit the papers to be filed with the judge, in which event the judge shall note thereon the filing date and forthwith transmit them to the office of the clerk. A paper filed by E-Filing in compliance with Chief Justice Directive 06-02 constitutes a written paper for the purpose of this Rule. The clerk shall not refuse to accept any paper presented for filing solely because it is not presented in proper form as required by these rules or any local practice.
(f) Inmate Filing and Service. Except where personal service is required, a pleading filed or served by an inmate confined to an institution is timely filed or served if deposited in the institution's internal mailing system on or before the last day for filing or serving. If an institution has a system designed for legal mail, the inmate must use that system to receive the benefit of this rule.

C.R.C.P. 305

(a), (b), (d), and (e) amended July 22, 1993, effective 1/1/1994; entire rule repealed and readopted and effective 6/28/2007.