Can a party serve their own summons in Montana?

No. Montana Rule of Civil Procedure 4(d)(2) limits service of a summons and complaint to a sheriff, deputy sheriff, constable, or a non-party adult over 18. A party to the case may not serve it.

Is ordinary mail enough to serve a Montana summons?

No. Ordinary mail alone does not serve a Montana summons. Rule 4(d)(3) requires first-class mail plus two copies of a notice-and-acknowledgment form conforming to Form 18-A and a prepaid return envelope, and service is complete only once the defendant signs and dates the acknowledgment. Mail service also cannot be used on a minor, an incompetent person, or a corporation, partnership, or unincorporated association.

Does Montana have an official proof of service form?

No. The Rule 4 Appendix of Forms contains a summons and a mail notice-and-acknowledgment pair, Forms 18-A and 18-B, but no numbered proof-of-service or affidavit-of-service form. Rule 4(r) lists the required content instead, and the issuing court's own version controls if one is required.

Does a Montana proof of service need to be notarized?

Not necessarily. A non-officer server's affidavit under Rule 4(r)(1)(B) can be replaced by an unsworn written declaration subscribed as true under penalty of perjury, as Montana Code Annotated 1-6-105 allows. A sheriff, deputy sheriff, or constable instead files an officer's certificate, with no affidavit, declaration, or notary required.

How long do I have to serve a summons in Montana?

A plaintiff must accomplish service within 3 years after filing the complaint (Mont. R. Civ. P. 4(t)(1)). Absent an appearance by the defendant, the court must dismiss the action without prejudice if the plaintiff fails to serve within that time.

Is there a deadline to file the proof of service in Montana?

No. Current Montana Rule of Civil Procedure 4(r) sets no deadline to file the proof of service once service is made, and failure to file it does not affect the validity of the service itself (Rule 4(r)(3)).

Who has to register as a process server in Montana?

Anyone, paid or unpaid, who makes more than 10 services of process within Montana in a calendar year must register with the Board of Private Security under MCA 25-1-1101 and MCA 37-60-301. A sheriff, constable, coroner, elisor, government employee acting in the course of employment, and a licensed attorney are exempt from that registration requirement.

What happens if service of a Montana summons is defective?

Defective service can leave the court without jurisdiction over the defendant, which can void a default judgment later. Follow Rule 4's requirements on who may serve, the method used, and the proof's content exactly, and never sign a proof of service that misstates how or when service occurred, since it is made under penalty of perjury.

Does this Montana proof of service cover federal court, service abroad, or a government defendant?

No. Service on the federal government, a foreign country, or under the Hague Service Convention, and service in federal court under the Federal Rules of Civil Procedure, follow separate rules not covered on this page.

Montana Proof of Service

Q: Who may serve a summons and complaint in Montana?

A sheriff, deputy sheriff, or constable, or any person over 18 who is not a party to the action (Mont. R. Civ. P. 4(d)(2)). Anyone, paid or not, who makes more than 10 services of process in Montana in a calendar year must also register as a process server with the state's Board of Private Security, unless exempt.

Montana lets a sheriff, deputy sheriff, or constable serve a summons, or any non-party adult over 18, but anyone making more than 10 services of process in Montana in a calendar year must register with the state, and a plaintiff has 3 years after filing to complete service.

Find out where you stand in Montana

Where are you with service?

DocDraft provides document preparation, not legal advice.

Introduction

In Montana, a summons and complaint may be served by a sheriff, deputy sheriff, or constable, or by any person over 18 who is not a party (Mont. R. Civ. P. 4(d)(2)). A party cannot serve their own summons. Anyone, paid or not, who makes more than 10 services of process in Montana in a calendar year must register with the Board of Private Security; sheriffs, constables, coroners, government employees acting in the course of employment, and licensed attorneys are exempt (MCA 25-1-1101). Montana has no numbered proof-of-service form, so the court's own version controls if one is required. A server other than an officer signs an affidavit, but MCA 1-6-105 lets a written declaration under penalty of perjury replace a notarized affidavit; an officer instead certifies service. Personal delivery to the person or an authorized agent is the main method; ordinary mail alone does not serve a summons. Mail service works only with two copies of a notice-and-acknowledgment form, a prepaid return envelope, and the defendant's signed acknowledgment; without it within 21 days, personal service is required. A plaintiff has 3 years after filing to complete service, and current Rule 4 sets no deadline to file the proof. Later papers go to the attorney of record if the party is represented, unless the court orders service on the party, and need only a certificate of service, which a party may sign. Federal, foreign, and government-entity service follow separate rules not covered here. Because the proof is sworn, never misstate how or when service occurred. Attorney review is available.

Key Things to Know

1
A summons and complaint may be served by a sheriff, deputy sheriff, or constable, or by any person over 18 who is not a party to the action (Mont. R. Civ. P. 4(d)(2)). Montana has no numbered statewide proof-of-service form; the Rule 4 Appendix of Forms contains only a summons (Form 1) and a mail notice-and-acknowledgment pair (Forms 18-A and 18-B), so the issuing court's own version controls if one is required.
2
A party to the case cannot serve their own summons. Separately, anyone, paid or not, who makes more than 10 services of process within Montana in one calendar year must register as a process server with the Board of Private Security under MCA 25-1-1101 and MCA 37-60-301; sheriffs, constables, coroners, an elisor, government employees acting in the course of employment, and licensed attorneys are exempt from that registration requirement.
3
A server who is not a sheriff or other officer proves service by affidavit under Rule 4(r)(1)(B), but MCA 1-6-105 lets an unsworn written declaration subscribed as true under penalty of perjury stand in for a notarized affidavit. If served by a sheriff or other officer, proof is that officer's certificate instead, with no affidavit or declaration required (Rule 4(r)(1)(A)).
4
Ordinary mail alone does not serve a Montana summons. Rule 4(d)(3) allows mail service only with first-class mail, postage prepaid, plus two copies of a notice-and-acknowledgment form conforming to Form 18-A and a prepaid return envelope; service is complete only when the defendant signs and dates the acknowledgment. If no acknowledgment arrives within 21 days, service must be made in person, and the court must order the non-responding defendant to pay the costs of personal service absent good cause. Mail service may not be used on a minor, an incompetent person, or a corporation, partnership, or unincorporated association.
5
Rule 4 has no general leave-at-dwelling substituted service for an adult individual; Rule 4(e) offers only personal delivery to the person or to an authorized agent. If a defendant cannot be found, the remedies are service by publication, once a week for three successive weeks in a county newspaper after a court order and an affidavit of due diligence (Rule 4(o)), or, for a business entity, service on the Secretary of State (Rule 4(j)).
6
A plaintiff must accomplish service within 3 years after filing the complaint, or the court must, absent an appearance by the defendant, dismiss the action without prejudice (Rule 4(t)(1)). The current Rule 4(r) sets no deadline to file the proof of service once service happens; failure to file proof does not affect the validity of the service itself (Rule 4(r)(3)).
7
Later papers, such as motions, go to the attorney of record if the party is represented, unless the court orders service on the party, by hand delivery, leaving a copy at the office, leaving it at the dwelling only if the office is closed or there is no office, mailing to the last known address, or electronic means if the recipient consented in writing (Rule 5(b)). Mail service of a later paper is complete upon mailing, with no added days. Any such paper must be filed with a certificate of service within a reasonable time after service (Rule 5(d)(1)), and unlike the summons, a party may serve these papers.

Key decisions before you file

Before you file a Proof of Service in Montana, a few decisions shape the document: which option to choose and what each one means. The Proof of Service guide walks through them.

Open the Proof of Service guide

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[COURT NAME], MONTANA [COUNTY] COUNTY

[PLAINTIFF NAME], Plaintiff, v. Cause No. [CAUSE NUMBER] Hon. [JUDGE NAME] [DEFENDANT NAME], Defendant.

PROOF OF SERVICE

Montana has no numbered statewide proof-of-service form. This proof follows Mont. R. Civ. P. 4(r); if the issuing court requires its own version, that form controls.

OFFICER'S CERTIFICATE

[IF APPLICABLE: I certify that I am a sheriff, deputy sheriff, or constable of [COUNTY] County, Montana. I served a copy of the Summons and Complaint, together with [OTHER PAPERS SERVED, IF ANY], on [NAME OF PERSON SERVED], on [DATE OF SERVICE] at [TIME OF SERVICE], at [ADDRESS OR PLACE OF SERVICE].]

NON-OFFICER AFFIDAVIT OR DECLARATION

[IF APPLICABLE: I am over 18 and not a party to this action. I knew the person served to be the person named in, and intended to be served with, the Summons and Complaint. I served a copy of the Summons and Complaint, together with [OTHER PAPERS SERVED, IF ANY], on [NAME OF PERSON SERVED] by [PERSONAL DELIVERY TO THE PERSON SERVED OR AN AUTHORIZED AGENT, OR, FOR A MINOR OVER 14, TO THE MINOR AND AN ADULT RESIDENT AT THE MINOR'S ABODE, OR, FOR A BUSINESS, TO THE PERSON IN CHARGE AT ITS MONTANA OFFICE], on [DATE OF SERVICE] at [TIME OF SERVICE], at [ADDRESS OR PLACE OF SERVICE].

[IF APPLICABLE: Service was instead by mail under Rule 4(d)(3). I mailed the Summons and Complaint by first-class mail, postage prepaid, with two copies of a Form 18-A notice-and-acknowledgment and a prepaid return envelope, on [DATE OF MAILING]. [NAME OF PERSON SERVED] signed and dated the acknowledgment on [DATE ACKNOWLEDGMENT SIGNED], and the signed acknowledgment is attached to this proof.]

[IF APPLICABLE: Service was instead by publication under Rule 4(o), ordered on [DATE OF ORDER]. Notice was published once a week for three successive weeks in [NAME OF NEWSPAPER], a newspaper in [COUNTY] County. The publisher's affidavit, and an affidavit of deposit of a copy in the post office if a copy was deposited, are attached to this proof.]

[IF SIGNED IN MONTANA: I declare under penalty of perjury that the foregoing is true and correct.] [IF SIGNED OUTSIDE MONTANA: I declare under penalty of perjury and under the laws of the state of Montana that the foregoing is true and correct.] MCA 1-6-105 permits this in place of a notarized affidavit.

Signed on [DATE SIGNED] at [CITY AND STATE WHERE SIGNED].]

[IF APPLICABLE: NOTARY BLOCK

Subscribed and sworn to before me on [DATE] by [NAME OF SERVER].

[SIGNATURE OF NOTARY PUBLIC] Notary Public for the State of Montana My commission expires: [DATE]]

[SIGNATURE] [NAME OF SERVER] [ADDRESS OF SERVER] [CITY, STATE ZIP] Official capacity, if any: [OFFICIAL CAPACITY OF SERVER]

CERTIFICATE OF SERVICE OF LATER PAPERS

[IF APPLICABLE: I certify that on [DATE], I served a copy of [NAME OF DOCUMENT] on [NAME OF PARTY OR ATTORNEY OF RECORD] by [HAND DELIVERY, LEAVING A COPY AT THE OFFICE WITH THE PERSON IN CHARGE, LEAVING A COPY AT THE DWELLING WITH A PERSON OF SUITABLE AGE AND DISCRETION BECAUSE THE OFFICE WAS CLOSED OR THERE IS NO OFFICE, MAILING TO THE LAST KNOWN ADDRESS, OR ELECTRONIC MEANS CONSENTED TO IN WRITING UNDER RULE 5(b)(2)(E)], at [ADDRESS, EMAIL ADDRESS, OR OTHER LOCATION].

I declare under penalty of perjury that the foregoing is true and correct.

Signed on [DATE SIGNED] at [CITY AND STATE WHERE SIGNED].

[SIGNATURE] [NAME]]

Montana Requirements for Proof of Service

No Mandatory Statewide Proof-of-Service Form
Montana's Rule 4 Appendix of Forms contains only a summons (Form 1) and a mail notice-and-acknowledgment pair (Forms 18-A and 18-B), not a numbered proof-of-service form. Rule 4(r) lists the required content instead, and the issuing court's own version controls if one is required.
Party Barred From Serving the Summons
A party to the case cannot serve their own summons and complaint. Service is limited to a sheriff, deputy sheriff, constable, or a non-party adult over 18 (Mont. R. Civ. P. 4(d)(2)).
Process-Server Registration Above 10 Services a Year
Anyone, paid or not, who makes more than 10 services of process within Montana in a calendar year must register with the Board of Private Security under MCA 25-1-1101 and MCA 37-60-301. Sheriffs, constables, coroners, an elisor, government employees acting in the course of employment, and licensed attorneys are exempt.
Mail Requires an Acknowledgment, Not Ordinary Mail
Rule 4(d)(3) allows mail service of a summons only with first-class mail, two copies of a notice-and-acknowledgment form conforming to Form 18-A, and a prepaid return envelope; service is complete only when the defendant signs the acknowledgment. Without it within 21 days, personal service is required and the court must order the non-responding defendant to pay its costs absent good cause.
Statutory Declaration in Place of a Notarized Affidavit
A non-officer server's affidavit under Rule 4(r)(1)(B) may instead be an unsworn written declaration subscribed as true under penalty of perjury, as Montana Code Annotated 1-6-105 allows. An officer's certificate requires no affidavit or declaration at all.
Three-Year Window to Complete Service
A plaintiff must accomplish service within 3 years after filing the complaint, or the court must, absent an appearance by the defendant, dismiss the action without prejudice (Mont. R. Civ. P. 4(t)(1)). The current rule sets no separate deadline to file the proof of service.
Service by Publication for an Unfindable Defendant
When a defendant cannot with due diligence be found, has left the state, or is evading service, a court may order service by publication once a week for three successive weeks in a county newspaper, (Mont. R. Civ. P. 4(o)). Proof is the publisher's affidavit plus an affidavit of deposit of a copy in the post office, if one was deposited (Rule 4(r)(1)(C)).
Certificate of Service for Later Papers
A later paper such as a motion must be filed together with a certificate of service within a reasonable time after service (Rule 5(d)(1)); unlike the summons, a party to the case may serve these papers and sign the certificate.
Mail Service of Later Papers Complete Upon Mailing
Mailing a later paper to the recipient's last known address completes service immediately upon mailing, with no additional days added for mail time (Mont. R. Civ. P. 5(b)(2)).

Find out where you stand in Montana

Introduction

Key Things to Know

Key decisions before you file

Customize your Proof of Service Template with DocDraft

Montana Requirements for Proof of Service

No Mandatory Statewide Proof-of-Service Form

Party Barred From Serving the Summons

Process-Server Registration Above 10 Services a Year

Mail Requires an Acknowledgment, Not Ordinary Mail

Statutory Declaration in Place of a Notarized Affidavit

Three-Year Window to Complete Service

Service by Publication for an Unfindable Defendant

Certificate of Service for Later Papers

Mail Service of Later Papers Complete Upon Mailing

Frequently Asked Questions