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R 2103.Service of papers.

Article 21. Papers · Last amended 2016 · Last verified July 21, 2026

In one sentenceCPLR 2103 lays out who may serve papers in a pending New York action, the methods for serving an attorney or an unrepresented party, and the rule that every paper served on one party must be served on every other party who has appeared.

Full Text of CPLR 2103

Text sizeJump to: (a) (b) (c) (d) (e) (f)

(a) Who can serve. Except where otherwise prescribed by law or order of court, papers may be served by any person not a party of the age of eighteen years or over.
(b) Upon an attorney. Except where otherwise prescribed by law or order of court, papers to be served upon a party in a pending action shall be served upon the party’s attorney. Where the same attorney appears for two or more parties, only one copy need be served upon the attorney. Such service upon an attorney shall be made:
1. by delivering the paper to the attorney personally; or 2. by mailing the paper to the attorney at the address designated by that attorney for that purpose or, if none is designated, at the attorney’s last known address; service by mail shall be complete upon mailing; where a period of time prescribed by law is measured from the service of a paper and service is by mail, five days shall be added to the prescribed period if the mailing is made within the state and six days if the mailing is made from outside the state but within the geographic boundaries of the United States; or 3. If the attorney’s office is open, by leaving the paper with a person in charge, or if no person is in charge, by leaving it in a conspicuous place; or if the attorney’s office is not open, by depositing the paper, enclosed in a sealed wrapper directed to the attorney, in the attorney’s office letter drop or box; or 4. by leaving it at the attorney’s residence within the state with a person of suitable age and discretion. Service upon an attorney shall not be made at the attorney’s residence unless service at the attorney’s office cannot be made; or 5. by transmitting the paper to the attorney by facsimile transmission, provided that a facsimile telephone number is designated by the attorney for that purpose. Service by facsimile transmission shall be complete upon the receipt by the sender of a signal from the equipment of the attorney served indicating that the transmission was received, and the mailing of a copy of the paper to that attorney. The designation of a facsimile telephone number in the address block subscribed on a paper served or filed in the course of an action or proceeding shall constitute consent to service by facsimile transmission in accordance with this subdivision. An attorney may change or rescind a facsimile telephone number by serving a notice on the other parties; or 6. by dispatching the paper to the attorney by overnight delivery service at the address designated by the attorney for that purpose or, if none is designated, at the attorney’s last known address. Service by overnight delivery service shall be complete upon deposit of the paper enclosed in a properly addressed wrapper into the custody of the overnight delivery service for overnight delivery, prior to the latest time designated by the overnight delivery service for overnight delivery. Where a period of time prescribed by law is measured from the service of a paper and service is by overnight delivery, one business day shall be added to the prescribed period. “Overnight delivery service” means any delivery service which regularly accepts items for overnight delivery to any address in the state; or 7. by transmitting the paper to the attorney by electronic means where and in the manner authorized by the chief administrator of the courts by rule and, unless such rule shall otherwise provide, such transmission shall be upon the party’s written consent. The subject matter heading for each paper sent by electronic means must indicate that the matter being transmitted electronically is related to a court proceeding.
(c) Upon a party. If a party has not appeared by an attorney or the party’s attorney cannot be served, service shall be upon the party by a method specified in paragraph one, two, four, five or six of subdivision (b) of this rule.
(d) Filing. If a paper cannot be served by any of the methods specified in subdivisions (b) and (c), service may be made by filing the paper as if it were a paper required to be filed.
(e) Parties to be served. Each paper served on any party shall be served on every other party who has appeared, except as otherwise may be provided by court order or as provided in section 3012 or in subdivision (f) of section 3215. Upon demand by a party, the plaintiff shall supply that party with a list of those who have appeared and the names and addresses of their attorneys.
(f) Definitions. For the purposes of this rule:
1. “Mailing” means the deposit of a paper enclosed in a first class postpaid wrapper, addressed to the address designated by a person for that purpose or, if none is designated, at that person’s last known address, in a post office or official depository under the exclusive care and custody of the United States Postal Service within the United States;
2. “Electronic means” means any method of transmission of information between computers or other machines designed for the purpose of sending and receiving such transmissions, and which allows the recipient to reproduce the information transmitted in a tangible medium of expression;
3. “Facsimile transmission” means any method of transmission of documents to a facsimile machine at a remote location which can automatically produce a tangible copy of such documents.

Plain-English Summary

Once a case is underway, CPLR 2103 becomes the traffic rule for every paper that moves between the parties. Anyone who isn't a party and is at least eighteen can serve. And if a party has a lawyer, papers go to the lawyer, not the client directly, unless a specific law says otherwise.

Subdivision (b) lists the approved ways to serve an attorney: hand delivery, mail, leaving the paper at an open office (or in a letter drop if the office is closed), leaving it at the attorney's residence as a last resort, fax where the attorney has designated a fax number, overnight delivery, or electronic means authorized by the chief administrator of the courts. Each method comes with its own rule for when service counts as complete, and mailed or overnight-delivered papers add extra days to whatever deadline runs from service, since the mail doesn't move as fast as hand delivery.

If there's no attorney to serve, or the attorney can't be reached, service falls back to the party directly, using a narrower list of methods. And if none of that works, subdivision (d) allows service by filing the paper with the court as a last resort. The rule closes with the housekeeping detail that matters most in practice: every paper served on one party has to go to every other party who has appeared in the case, so no one is arguing a motion in the dark.

Frequently Asked Questions

Who is allowed to serve papers in a New York lawsuit?

Anyone who is not a party to the case and is eighteen or older, unless a specific law or court order says otherwise. CPLR 2103(a).

How many extra days do I get when a paper is served on me by mail?

Five days if the mailing originates within New York, six days if it's mailed from elsewhere in the United States, under CPLR 2103(b)(2). Service by overnight delivery adds one business day instead.

Can I serve papers directly on the other party if they have a lawyer?

No. CPLR 2103(b) requires papers to go to the party's attorney once the attorney has appeared, except in the narrow situations the rule spells out.

What if I can't find the attorney's office open or reach them at their residence?

CPLR 2103(d) allows service by filing the paper with the court, as a last resort, when none of the other methods in the rule can be used.

Does every party in the case get a copy of every paper I serve?

Yes. CPLR 2103(e) requires each paper served on any party to be served on every other party who has appeared, with narrow exceptions the CPLR spells out elsewhere.

Can I serve an attorney by fax or email?

By fax, yes, if the attorney has designated a fax number for that purpose; by electronic means, only as authorized by the chief administrator of the courts and, unless a rule provides otherwise, with the party's written consent. CPLR 2103(b)(5), (7).

Advisory Committee Notes

(See also Advisory Committee notes preceding § 210, under subheading “Service of papers.”) Subd (a). There was no provision under former law as to who can serve papers in general. The age limitation of subd (a) is based upon CPA § 220 which deals with persons who can serve a summons; it has been adopted for all papers. Cf. NY CPA § 1243 (service of writ of habeas corpus to be made by person over 21). The prohibition against service of a summons by a party has also been made applicable to papers in general.

Subd (b) is derived from CPA §§ 163, 163-a and 164 and of RCP 20. The specific exceptions contained in the CPA sections and RCP rule as to service of a summons and a contempt paper are included under the general exception in this subdivision concerning service otherwise specifically provided for by law. Subparagraph 1 is derived from the opening sentence of RCP 20. The first sentence of subparagraph 2 is derived from subparagraph 1 of RCP 20. The requirement that mailing be from the city, village, or town of the server has been eliminated; mailing under the proposed rule may be from anywhere within the state. With the speed of our modern mail service, mailing anywhere within the state gives sufficient assurance of prompt delivery. The phrase “last known address” is intended to include the last phrase of RCP 20, subparagraph 1. The second sentence of subparagraph 2 of the subdivision is partially derived from § 163-a of the CPA. “Post office” and “official depository” are used as generic terms to include all the depositories listed in § 163-a. The provision that service by mail is complete upon deposit, derived from Federal rule 5(b), represents the law in New York. Jackson & Perkins Co. v Rose Fair, Inc. 278 App Div 890, 104 NYS2d 892 (4th Dept 1951). The third sentence of subparagraph 2 is derived from § 164 of the CPA. No change in substance is intended except for the elimination of a separate provision for notes of issue. Since a note of issue must be served at least twelve days before a term begins (NY R Civ P 150), the application of the general three-day extension for mailing does not differ sufficiently from the provision of CPA § 164 for mail service of a note of issue fourteen days before trial, to merit special treatment. The general rule that three days shall be added to a prescribed period measured from service is intended to apply to both the situation in which there must be a minimum period of notice before an act is to be done and to the situation in which an act is to be done within a maximum period after service. The first part of subparagraph 3 of this subdivision is derived from subparagraph 2 of RCP 20. The limitation on the time of the day during which service can be made by leaving in a conspicuous place is eliminated in favor of the general requirement, existing under former law, that the office be open. If the office is open, no hardship will result from service at another time of the day. If the office is not open, service cannot be made as designated. “Person in charge” is intended to include the partner or clerk specified in the former provision. The second part of subparagraph 3 is derived from subparagraph 3 of RCP 20. The phrase “accessible from without the office” is omitted as unnecessary. It is implied from the fact that the office is closed. Subparagraph 4 is derived from the last phrase of subparagraph 3 of RCP 20. The provision in the second sentence that this method cannot be used unless service cannot be effected at the attorney’s office is similar to the present provision allowing home service only if the attorney’s office is not open; because it is explicitly limited to attorneys, this provision is inapplicable to service on a party pursuant to this subparagraph when incorporated in subdivision (c). The provision of subparagraph 4 of RCP 20, that where service may be made at an attorney’s residence, it may be made on an attorney living out of the state by mailing it to his office within the state from the city, village or town where his office is located, has been eliminated. Since inability to serve the attorney at his office, which may be by mail from anywhere within the state, would be a prerequisite to service at his residence, this provision seems useless.

Provision has been added for service of only one copy where an attorney appears for more than one party. This is based upon the third sentence of CPA § 275.

Subd (c) is derived from RCP 20. The requirement of service upon the party when he has not appeared by an attorney is implicit in the former law. The requirement of service upon the party when his attorney cannot be served is added in preference to service by filing under subd (d) of this rule. Service by filing provides the least adequate notice and should be allowed only as a last resort. The mode of service on a party is derived from the opening sentence and subparagraphs 1 and 5 of RCP 20. The limitation on the time of the day during which service can be made at a party’s residence, contained in subdivision 5 of rule 20, is eliminated. This is in accordance with the former law as to service at an attorney’s residence and service of a summons. There seems no reason to make a distinction.

Subd (d) is derived from parts of subparagraphs 4 and 5 of RCP 20. This method of service is permitted only after all others have failed. The term “filing” is used instead of “leaving it with the clerk” to make clear that it is intended that the clerk keep the paper on file for the inspection of the other party and also to make applicable the filing requirements of new CPLR rule 2102.

Subd (e) is derived from CPA § 163. The requirement that a party in jail for want of bail must be served although he has failed to appear, has been eliminated. There seems no reason to treat a party so confined differently in this respect from a party who fails to appear for another reason. In all cases of excusable neglect, of course, relief may be had from a default judgment. NY Civ Prac Act § 108.

The traditional three days by (which a responding period is extended when the paper to be responded to is served by mail has proved too short in recent years, as the mails ( have been increasingly delayed. The Committee has been asked on a number of occasions in recent years to make a change in CPLR 2103(b) (2), where the three-day period is provided, and has decided to recommend the modest step of increasing it to five days. There have of course been reported instances in which even five days did not do the job, but these have not been frequent. The relatively rare case in which it takes more than five days for first-class mail to reach its goal should not, in the Committee’s view, be made the criterion for amendment. The Committee settled on the five-day suggestion after being apprised of the results of a survey conducted by a large law firm in New York City. Some 90% of mailed papers were received within three days, but 99% were received within five.

If mail service grows worse, further amendment can be made of CPLR 2103(b) (2) at a later time to stretch the extension period further.

1989 Recommendations of Advisory Committee on Civil Practice:

The Committee recommends that CPLR 2103 be amended to provide authorization to serve interlocutory papers upon an attorney or pro se party by overnight courier service. This will expedite the service of interlocutory papers and reflects a form of delivery papers that is used frequently by all businesses and professions.

The Committee recommends that service by express courier (overnight delivery service) should be deemed complete upon delivery of the paper to the express courier service, provided that the express courier service is one approved for this purpose by rule of the Chief Administrator of the Courts, a necessary safeguard against the use of undependable courier services, which might occasion new instances of “sewer service.” The major advantage of utilizing the express courier method of service would be a proposed shortening of the length of time in which the party in receipt of the document is deemed to have received the document, thereby shortening the period in which the party would be required to respond. In this respect, the Committee recommends that the five-day addition to respond contained in CPLR 2103(2) be reduced to one business day where express courier service is used.

The Committee also recommends that the new requirements for overnight delivery service eliminate the feature of mail service that the depository must be “in the state.” There is no reason why an attorney should not be able to entrust an overnight delivery envelope to a delivery service in New Jersey or another state.

1990 Recommendations of Advisory Committee on Civil Practice:

The Committee recommends that the inconsistent numbering of paragraphs and other technical inconsistencies in CPLR 2103 (Service of papers) there were occasioned by the separate enactment in 1989 of Chapters 461 and 478 of the Laws of 1989 be eliminated and the provisions amended by those acts be harmonized. Chapter 461 of the Laws of 1989 amended CPLR 2103 to provide for service of interlocutory papers upon attorneys by electronic transmission (including “fax”), and Chapter 478 amended the same provisions to authorize service of interlocutory papers upon attorneys by overnight courier services, both acts effective on January 1, 1990. Since these enactments were made without reference to one another, they resulted in some structural inconsistencies in the section, including the two different paragraphs both numbered paragraph 5. Clarification is desirable to avoid confusion; no substantive change is intended or made.

1999 Recommendations of Advisory Committee on Civil Practice:

Many members of both Bench and Bar have suggested that greater use be made of new technologies in the filing and service of legal papers in civil proceedings. If properly regulated, such technologies can expedite litigation and reduce its administrative costs to the parties.

This measure is offered in response to these suggestions. It would authorize conduct of two experiments in the filing and exchange of legal documents by means other than the traditional mailing or personal delivery of paper. One experiment would make use of telefax machines and another would make use of electronic mail (or any other available medium for the electronic transmission of documents). The telefax experiment would be conducted in no more than six counties (at least one in each of the four Judicial Departments), as selected by the Chief Administrative Judge with the approval of the Administrative Board of the Courts. The electronic transmission experiment would be conducted in one of New York City’s five counties and in no more than two counties outside the City, likewise selected by the Chief Administrative Judge with the approval of the Administrative Board of the Courts. Both experiments would extend through July 1, 2003, with the Chief Administrative Judge being required, at least three months in advance of that sunset, to report to the Governor, the Legislature and the Chief Judge of the Senate his evaluation of them. Both experiments would apply to the filing of a summons and complaint with a court to commence an action and, as well, to the exchange of legal papers between counsel for the parties in civil litigation.

2014 Recommendations of the Advisory Committee on Civil Practice.

This measure would repeal the language in CPLR 2103(f)(1) that requires papers served by mail be mailed within the State of New York. Subdivision (f) of rule 2103 defines “mailing” for purposes of service of papers in a pending action upon the party’s attorney. This proposal also extends by one day to six days the prescribed period of time for response to a paper when service under this section by mail is made by depositing papers with the Postal Service from outside the state.

The Committee takes particular note of a recent decision by the Appellate Division, First Department, holding insufficient service by mail made outside the State but in every other aspect made correctly with the United States Postal Service (M. Entertainment, Inc. v. Leydier (2009 NY Slip Op 04169)(May 28, 2009)reversed on other grounds, 2009 NY Slip Op 07671 (October 27, 2009)). Notably, the dissent points out that the relevant notice of appeal was served by mail by depositing it with the Postal Service in New Jersey, instead of New York.

The Committee notes that CPLR 2103(b)(6), the rule regarding service upon an attorney via dispatch by overnight delivery service (CPLR 2103(b)), does not require such dispatch to be made within the State, only that the service regularly accept items for overnight delivery within the State, as follows:

“(b) Upon an attorney. Except where otherwise prescribed by law or by order of court, papers to be served upon a party in a pending action shall be served upon the party’s attorney. Where the same attorney appears for two or more parties, only one copy need be served upon the attorney. Such service upon an attorney shall be made:*** “6. by dispatching the paper to the attorney by overnight delivery service at the address designated by the attorney for that purpose or, if none is designated, at the attorney's last known address. Service by overnight delivery service shall be complete upon deposit of the paper enclosed in a properly addressed wrapper into the custody of the overnight delivery service for overnight delivery, prior to the latest time designated by the overnight delivery service for overnight delivery. Where a period of time prescribed by law is measured from the service of a paper and service is by overnight delivery, one business day shall be added to the prescribed period. “Overnight delivery service” means any delivery service which regularly accepts items for overnight delivery to any address in the state; or...”(emphasis added).

The Committee believes the rule for mailing should correspond with that for a delivery service. The Committee also believes that allowing service by mail from outside the State will remove an artificial barrier to service and encourage litigation to be brought in New York. Finally, the act of removing this requirement recognizes the current realities of multi-state practice and the increased mobility of litigants and litigation.

2015 Recommendations of the Advisory Committee on Civil Practice.

The Committee recommends this measure which would repeal the language in CPLR 2103(f)(l) that requires that papers served by mail upon an attorney in a pending action be mailed within the State of New York. This measure also extends by one day, to six days, the prescribed period of time for response to such papers when they are served by mail from outside the State but within the geographic boundaries of the United States.

We take particular note of a recent decision by the Appellate Division, First Department, holding service by mail made outside the State insufficient (M Entertainment, Inc. v. Leydier (2009 NY Slip Op 04169) (May 28, 2009) reversed on other grounds, 2009 NY Slip Op 07671 (October 27, 2009)). In response, our Advisory Committee points out that CPLR 2103(b)(6), the rule regarding service upon an attorney via dispatch by overnight delivery service, does not require such dispatch to be made within the State, only that the service regularly accept items for overnight delivery within the State, as follows:

“(b) Upon an attorney. Except where otherwise prescribed by law or by order of court, papers to be served upon a party in a pending action shall be served upon the party’s attorney. Where the same attorney appears for two or more parties, only one copy need be served upon the attorney. Such service upon an attorney shall be made:*** “6. by dispatching the paper to the attorney by overnight delivery service at the address designated by the attorney for that purpose or, if none is designated, at the attorney's last known address. Service by overnight delivery service shall be complete upon deposit of the paper enclosed in a properly addressed wrapper into the custody of the overnight delivery service for overnight delivery, prior to the latest time designated by the overnight delivery service for overnight delivery. Where a period of time prescribed by law is measured from the service of a paper and service is by overnight delivery, one business day shall be added to the prescribed period. "Overnight delivery service" means any delivery service which regularly accepts items for overnight delivery to any address in the state; or…”(emphasis added).

The Committee's view is that the rule for mailing should correspond with that for a delivery service. The Committee also believes that allowing service by mail from outside the State will remove an artificial barrier to service and encourage litigation to be brought in New York. The act of removing this requirement recognizes the current realities of multi-state practice and the increased mobility of litigants and litigation. Finally, the measure has been amended to be limited in scope and application to the geographic boundaries of the United States.

This measure would have no fiscal impact on the State. It would take effect on the first day of January next succeeding the date on which it shall have become law.

Amendment History

Add, L 1962, ch 308, § 1; amd, L, 1963, ch 539, § 1, by Judicial Conference (1971); L 1982, ch 20, § 1; L 1989, ch 461, § 1, eff Jan 1, 1990; L 1989, ch 478, §§ 1, 2, eff Jan 1, 1990; L 1990, ch 244, §§ 1–3; L 1999, ch 367, §§ 3–5, eff July 27, 1999; L 2009, ch 416, § 1, eff Sept 1, 2009; L 2015, ch 572, §§ 1, 2, effective January 1, 2016.

Source & verification. Provision text, History, and Advisory Committee Notes are reproduced verbatim from the Consolidated Laws of New York. Last verified July 21, 2026. · Official source
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