New York Service of Process: Comprehensive Rules and Requirements

Service of process is the cornerstone of civil jurisdiction. In New York, improper service can invalidate an entire judgment, making strict compliance with the Civil Practice Law and Rules (CPLR) essential. This guide covers the full range of service methods available under New York law and the procedural requirements that govern them.

Personal Service (Hand Delivery)

Personal service — delivery of the summons and complaint directly to the defendant — is the most reliable and preferred method under CPLR § 308(1).

The process server must:

Hand the summons and complaint directly to the defendant

Ensure the defendant receives and understands what is being handed to them (the server should verbally identify the documents)

Hand the originals, not copies

The defendant must be served in person, whether in New York or out of state. There is no age requirement for accepting personal service on an individual defendant — a defendant of any age may be served directly. However, a person lacking mental capacity cannot make an informed acceptance, so service on them may be subject to challenge.

Personal service can occur anywhere: in public, on private property (if the server has permission or reasonable access), at home, at work, or on the street. New York courts have found service valid even when the defendant attempted to refuse or evade it, as long as the documents were clearly presented.

Substituted Service at Residence or Workplace

When personal service cannot be achieved, CPLR § 308(2) permits substituted service — leaving the summons and complaint with another person at the defendant's residence or workplace.

At the defendant's residence:

Service may be made by leaving the documents with a person of suitable age and discretion residing there

"Suitable age and discretion" typically means a person who appears to be an adult (courts do not specify a minimum age but expect judgment and capability)

The person receiving service must have apparent authority to receive mail or legal documents for the household

Service must be followed by mailing the same documents to the defendant's residence by regular mail (not certified mail)

The mailing must occur within a reasonable time after substituted service (generally within days, not weeks)

At the defendant's workplace:

Documents may be left with a person of suitable age and discretion employed at that location

The recipient should be someone in a position to reliably convey messages (receptionist, manager, etc.)

The recipient must be at the defendant's workplace or place of business

Mailing to the defendant must follow, addressed to their workplace address

Critical New York requirement: Substituted service is not effective without the follow-up mailing. Many practitioners mistakenly believe leaving documents with another person suffices; it does not. CPLR § 308(2) explicitly requires mailing. The defendant's actual receipt of the mailed documents is not necessary — the act of mailing completes the service.

Substituted service under CPLR § 308(2) is available only when the defendant cannot be personally served with due diligence. Courts require evidence of diligent efforts to locate the defendant before authorizing or accepting substituted service.

Service by Mail

New York permits service by mail under CPLR § 312-a, but with strict limitations compared to federal practice.

Certified mail with return receipt required:

The summons and complaint may be sent by certified mail with return receipt requested

A copy must also be sent by regular mail (first class)

Both the certified and regular mail must arrive at the defendant's last known address

Return of the green card (signed receipt) from certified mail is strong evidence of service

If the defendant refuses to sign the certified mail but regular mail is not returned, New York courts have sometimes found service effective

Important limitation: Service by mail is available only if:

The defendant's last known address is in New York State, or

The defendant is outside New York and the summons permits it, or

A court order authorizes it (CPLR § 308(5))

What does NOT work:

Regular mail alone to an out-of-state defendant (does not satisfy CPLR § 308)

Email or fax as primary service method (only in rare circumstances with court authorization)

The timing of mailing matters. Service is effective on the date of mailing (assuming proper return receipt), not upon the defendant's actual receipt.

Service by Publication

Service by publication is a method of last resort under CPLR § 308(5), used only when other methods are impracticable.

When available:

The defendant's residence and place of business are unknown, or

The defendant is absent from New York with intent to defraud or delay

The plaintiff has exercised due diligence without success in locating the defendant

The process:

The plaintiff must first petition the court for an order permitting service by publication

The petition must describe efforts to locate the defendant and explain why other service methods are impracticable

The order must specify the newspaper(s) in which publication will occur and the number of publications required

Typically, a New York newspaper of general circulation is required

Most orders require publication in at least two newspapers of general circulation in the county where the action is pending, with publication occurring once a week for four consecutive weeks (meaning 8 total publications if two papers are used)

Additional requirements:

Certified mail must be sent to the defendant's last known address

Affiants must describe diligent efforts to locate the defendant

The court has discretion over the precise method and timing

Service by publication is rarely granted for domestic defendants but may be appropriate for out-of-state defendants whose whereabouts are genuinely unknown.

Service on Corporations and LLCs

Registered agent service:

If a corporation or LLC has appointed a registered agent in New York, service must be made on that agent (CPLR § 311)

The registered agent's name and address are available through the New York Department of State website

Service on the registered agent may be made by personal service, substituted service, or mail

Secretary of State service:

For corporations and LLCs without a registered agent in New York, service may be made on the New York Secretary of State (CPLR § 306)

A copy of the summons and complaint must be mailed to the corporation's or LLC's last known address

Service on the Secretary of State requires:

- Delivery to the Secretary of State's office in Albany (by hand or mail)
- Mailing a copy to the defendant corporation/LLC at its last known address within 10 days

For foreign corporations:

If the corporation is doing business in New York but is incorporated elsewhere, service may be made on an officer, director, managing agent, or cashier found in New York (CPLR § 311)

Alternatively, service may be made on the Secretary of State as described above

Limited liability partnerships (LLPs) and partnerships follow similar rules, with service on a partner or the Secretary of State.

Service on Government Entities

New York imposes special rules for service on government entities due to sovereign immunity principles.

The State of New York:

Service must be made on the Attorney General at their office in Albany (CPLR § 213)

A copy must also be served on the specific agency involved

The address is typically: New York State Attorney General, 28 Liberty Street, New York, NY 10005

Counties and county officers:

Service on a county must be made on the county clerk or the district attorney (CPLR § 213)

Service on an individual county officer must be made on that officer personally or at their office

Cities, towns, villages, and municipal corporations:

Service on a municipality must be made on the city/town/village clerk (CPLR § 213)

The clerk's name and address are available through municipal records

Service may also be made on the corporation counsel or city attorney

School districts:

Service may be made on the school district superintendent or the board of education (Education Law § 3812)

Service must be made at the district office

Notice requirements:

After serving a government entity, the plaintiff should file proof of service with the court, noting the special requirements

Failure to serve government entities correctly can result in dismissal for lack of jurisdiction.

Service on Out-of-State Defendants: New York Long-Arm Statute

New York's long-arm statute, CPLR § 302, permits courts to exercise jurisdiction over out-of-state defendants in limited circumstances.

CPLR § 302(a)(1): Transaction of business in New York

The defendant transacted business in New York, or

The defendant contracted to supply goods or services in New York, or

The defendant caused tortious injury in New York by an act or omission outside the state

CPLR § 302(a)(2): Tortious act in New York

The defendant committed a tortious act within New York

CPLR § 302(a)(3): Real property in New York

The action arises from real property in New York where the defendant has an interest

CPLR § 302(a)(4): Intangible interests

The defendant, as executor, administrator, trustee of a trust in New York, or otherwise, has a duty to account for money in the state

Service on out-of-state defendants:

Once in-state service methods are unavailable or impracticable, service may be made on the defendant outside New York using the same methods (personal service, substituted service, mail)

Service by mail must include certified mail with return receipt (CPLR § 312-a)

Service by publication may be authorized if the out-of-state defendant cannot be located

The long-arm statute does not authorize service on a defendant lacking minimum contacts; it merely permits service when jurisdiction exists based on the defendant's activities.

Who May Serve Process

New York permits multiple categories of process servers.

Sheriffs:

County sheriffs are the default process servers in New York

They are officers of the court and their service is conclusively valid (absent fraud)

Many practitioners use sheriffs despite higher costs to ensure reliability

Registered private process servers:

Individuals and companies licensed as private investigators or process servers may serve documents

No specific state certification is required in New York, but many counties recognize or encourage use of private servers

A private server's affidavit of service is acceptable proof

Any adult over 18 (not a party):

Under CPLR § 308, any person 18 years or older who is not a party to the action may serve process

This includes friends, employees, or volunteers

The server's affidavit of service must state facts showing proper service (the server must be competent to testify about what occurred)

Courts are more skeptical of lay server affidavits; they must be detailed and credible

Attorneys serving process:

An attorney representing a party may serve process personally, but this is generally discouraged as it may complicate proof of service

An attorney's affidavit of service is accepted

Who cannot serve:

The defendant themselves cannot serve their own documents on the opposing party

A party to the action may not serve in their own litigation

Time Limits for Completing Service

Initial service deadline:

The summons must be served within 120 days of filing the complaint (CPLR § 213(2))

Failure to serve within 120 days may result in dismissal without prejudice (though the plaintiff may re-serve and re-file)

Extended deadline for good cause:

The court may extend the 120-day period for good cause shown

Extensions must be requested before the 120-day period expires (or shortly thereafter if an excuse is shown)

Tolling:

The 120-day period is tolled (paused) if the plaintiff is prevented from serving by court order or by the defendant's conduct (e.g., the defendant prevents service through evasion)

Service of subsequent documents:

Once the defendant is served with the initial summons and complaint, subsequent documents (motions, discovery, etc.) must be served within time frames set by the CPLR and rules of practice, but these vary by document type

Proof of Service and Affidavit of Service

What must be proven:

The server's affidavit of service must set forth facts showing that service complied with the CPLR

The affidavit must identify the defendant, describe the documents served, state the method of service, provide the date and location of service, and confirm the server's belief in the defendant's identity

For personal service:

The affidavit should describe the defendant's appearance or identity verification method, state where service occurred, and confirm the defendant received the documents

For substituted service:

The affidavit must name or describe the person receiving service, confirm they were at the defendant's residence or workplace, confirm mailing occurred, and provide the mailing address and date

For service by mail:

The affidavit should reference the return receipt from certified mail or state that the documents were mailed by regular mail

For service by publication:

The affidavit of publication (typically filed by the newspaper) must confirm the dates and newspapers in which publication occurred

Filing the affidavit:

The affidavit of service should be filed with the court, though it is not always required before the defendant appears

If the defendant challenges service, the affidavit becomes critical to proving jurisdiction

Return of service:

The process server returns the summons with an affidavit attached, confirming service or noting failure to serve

Defective Service: Motion to Quash

If service is defective, the defendant may move to quash under CPLR § 3211(a)(8), asserting lack of personal jurisdiction.

What constitutes defective service:

Service not made by an authorized person

Service not made on the correct defendant or wrong person

Service made using an improper method (e.g., email without authorization)

Failure to follow statutory requirements (e.g., substituted service without mailing)

Service outside the statute's time limits

The motion:

Must be made before or with the answer (CPLR § 3211(e))

If not raised in the answer or by pre-answer motion, service is deemed accepted

The defendant must file an affidavit explaining why service was improper

The plaintiff's response:

The plaintiff files an affidavit of service defending the service method

If the court finds the service adequate, the motion is denied

If defective, the court may dismiss the action without prejudice, allowing re-service

Cure of defective service:

Even if service is initially defective, the court may permit the plaintiff to re-serve before dismissing

Some defects (wrong address, wrong person) are easily curable; others (service years after filing) are not

Evasion of Service and Alternative Methods

When a defendant evades or conceals themselves to avoid service, CPLR § 308(5) authorizes the court to permit alternative service methods.

Grounds for alternative service:

The defendant is deliberately hiding to avoid service

Diligent efforts have been made but the defendant cannot be located

The defendant repeatedly avoids accepting service (e.g., refuses delivery, moves frequently)

Procedures:

The plaintiff petitions the court for permission to use an alternative method

The petition must detail efforts to serve and explain the evasion

The court may authorize:

- Service by email (uncommon but possible)
- Service by text message
- Service at a specific location where the defendant is known to frequent
- Posting at the defendant's last known address
- Service via social media or other electronic means

Service by email or electronic means:

Courts are cautious about electronic service to avoid claims the defendant did not receive notice

Generally requires the defendant's agreement or a court order

CPLR § 312-e permits service of certain documents by email if parties agree

Service in Special Proceedings

Divorce and matrimonial actions:

Service follows standard CPLR § 308 rules (personal, substituted, or mail)

The summons in a matrimonial action must include notice of the defendant's right to counsel and to an attorney for the child

Substituted service is common in divorce cases; the documents are usually left with an adult household member and mailed

Eviction proceedings:

Evictions are special proceedings under CPLR Article 7

The respondent (tenant) must be served with the notice of petition and petition

Service may be made by personal service, substituted service (leaving with an occupant and mailing), or posting on the premises if the respondent cannot be found

Posting is followed by mailing to the last known address

Service requirements in eviction cases are strictly construed; defective service often results in dismissal

Restraining orders and orders of protection:

Service is typically by personal service on the defendant (respondent)

If personal service is not practicable, the court may authorize alternative service

Bankruptcy-related proceedings:

Federal rules (Fed. R. Bankr. P.) govern service of process in bankruptcy court

Service methods are similar but governed by federal standards

Article 78 proceedings (challenges to administrative decisions):

Service is made on the respondent (agency) by personal or substituted service

Proof of service must be filed with the court

Key Takeaways

Personal service remains the gold standard, but substituted service (with mailing) and certified mail service are reliable alternatives when personal service is impracticable.

**The 120-day service deadline (