matrix, incorrect!!!, unless the court has served each individual party notice that they have decided to handle service of subsequent documents as you suggest, anyone that files anything with the court can be forced to serve everyone if they dont do it voluntarily, its the law...
OKLAHOMA STATUTES
TITLE 12.
CIVIL PROCEDURE
§122005. Service and filing of pleadings and other papers.
SERVICE AND FILING OF PLEADINGS AND OTHER PAPERS
A. SERVICE: WHEN REQUIRED. Except as otherwise provided in this title, every order required by its terms to be served, every pleading subsequent to the original petition unless the court otherwise orders because of numerous defendants, every paper relating to discovery required to be served upon a party or any other person unless the court otherwise orders, every written motion other than one which may be heard ex parte, and every written notice, appearance, demand, offer of judgment, 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 Section 2004 of this title.
B. SERVICE: HOW MADE. Whenever pursuant to this act service is required or permitted to be made upon a party represented by an attorney the service shall be made upon the attorney unless service upon the party himself is ordered by the court or final judgment has been rendered and the time for appeal has expired. Service upon the attorney or upon a party shall be made by delivering a copy to him or by mailing it to him at his lastknown address or, if no address is known, by leaving it with the clerk of the court. Delivery of a copy within this section means:
1. Handing it to the attorney or to the party; or
2. Leaving it at his office with his clerk or other person in charge thereof; or
3. If there is no one in charge, leaving it in a conspicuous place therein; or
4. If the office is closed or the person to be served has no office, leaving it at his dwelling house or usual place of abode with some person residing therein who is fifteen (15) years of age or older.
Except for service of the summons and the original petition, service by mail is complete upon mailing.
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 crossclaim, 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. All papers after the petition required to be served upon a party shall be filed with the court either before service or within a reasonable time thereafter, but the court may on motion of a party or on its own initiative order that depositions upon oral examination and interrogatories, requests for documents, requests for admission, and answers and responses thereto not be filed unless on order of the court or for use in the proceeding. All papers filed with the court shall include a statement setting forth the names of the persons served and the date, place, and method of service.
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