This article will provide guidance on What Do Process Servers in Missouri Do?  In Missouri process service refers to the delivery of legal documents, such as summonses, complaints, subpoenas, and other court documents, to individuals or businesses involved in a legal matter. Legal documents may be served by any person who is over the age of 18 and not a party to the legal matter. However, it is recommended that you work with a professional process server knowledgeable about Missouri law and procedures. At Undisputed Legal, we are well-informed about Missouri service methods. Click Here for Frequently Asked Questions About Process Servers!

 In Missouri, legal documents may be served by personal service, which involves delivering the documents directly to the individual or business, or by substituted service, which involves leaving the documents with a responsible adult or posting them in a conspicuous location if the individual or business is not available. Legal documents must be served within a specific timeframe, which can vary depending on the type of document being served and the court in which the legal matter is being heard. Click here for information on How Rush Process Service Can Expedite Your Case.

After the legal documents have been served, the process servers in Missouri must provide proof of service to the court to document that the individual or business has been properly served. If the individual or business to be served is located outside of Missouri, Missouri law requires that the legal documents be served in compliance with the laws of the state where the individual or business is located. Click here for information on How Service of Process Ensures A Solid Foundation.


The clerk must promptly issue the summons or other process necessary upon filing a pleading requiring service of process and will send it for service to the sheriff or other person properly authorized to serve the process. The clerk must serve the summons or other process to the party whose pleading requires service of process, together with a copy of the pleading. If a party requests that separate or extra summonses or other processes be issued in writing, it will be done.  Click here for information on How Process Servers Protect Your Rights: Myths Debunked

The summons must be issued by the clerk, bear the court’s official seal, identify the court and the parties, and be served on the defendant with the plaintiff’s attorney’s information (if any) or the plaintiff’s address (if no attorney is involved). In addition, it must inform the defendant that if he or she fails to appear and defend within the time and location specified by law, a default judgment will be issued against them or for the relief sought in the petition.  Except when service is publicly available, the summons and petition must be served simultaneously. 

An affidavit signed by the seeking party or someone acting on their behalf must be submitted if service is to be done through registered or certified mail. The name and address of the party to be served by mail and a statement explaining why personal service cannot be obtained within the state. When a summons and copy of the pleading need to be sent to a party, the clerk should use registered or certified mail and ask for a signed return receipt.

Process servers IN MISSOURI

When legal action is taken against a person in the United States, that person has a right to be informed of the proceeding. A procedure, or the paperwork outlining the legal action in its entirety, must be provided to them in order to satisfy this right and need. The service of process is the act of delivering the documents and establishing proof of delivery, so it cannot be argued in court or otherwise that the recipient never got the documents.

Formal legal notices such as subpoenas, complaints, and court dates. Undisputed Legal only retains reliable process servers in Missouri. We conduct service for our clients in a professional and discrete manner while also conforming to all applicable rules and regulations. In addition, we pay close attention to detail in everything we do, so you can be certain that your specific method will be followed when you get our report. We ensure that you are always kept in the loop as to the status of your service. We provide GPS affidavits of service as well as personalized ‘real-time’ email status updates. Additionally, we provide an email copy of the affidavit prior to mailing. New customers also get a free basic skip trace for new clients!

Court records and other legal documentation must be sent to the appropriate authorities in order for a case, claim, or lawsuit to be recognized. Undisputed Legal’s process servers in Missouri are experts in the three main ways of the serving process: personal, substituted, and publication or other alternative means of service.  Preferably, the papers are delivered to the defendant in person, either at their residence or business, by our process server. 

The service will most likely be attempted within five to seven days. However, the time it takes to complete the service may vary depending on the process server and other uncontrollable circumstances. 


Notice published according to a court order, or the clerk of such court constitutes service by publication. The notice must specify that an action has been commenced and should briefly describe the purpose and general nature of the action. The notice must also include the court’s name, the parties’ names to the civil action, and the name and address of the attorney, if any, for the plaintiff; otherwise, the plaintiff’s address. The required publishing frequency is once per week for four consecutive weeks in a newspaper of broad circulation in the county where the civil action is initiated. In the absence of such a publication, the court will choose a newspaper from which to make the required publication.

A summons and petition may be served on an individual, including a minor or a person deemed incompetent but without a guardian, by delivering a copy of the summons and petition to the individual in person, leaving a copy of the summons and petition at the individual’s residence or usual place of abode with a family member or household employee over the age of fifteen, or by delivering a copy of the summons and petition to an agent authorized by appointment. 

In Missouri, legal documents may be served by any person over eighteen and not a party to the legal matter. However, it is recommended that you work with a professional process servers in Missouri knowledgeable about  law and procedures like those at Undisputed Legal. We provide three levels of service, being [A.] Routine Service, wherein service is attempted within five to seven days of the receipt of documents; [B.] Rush Service, where the process server will make their first attempt within forty-eight hours of receipt of documents and [C.] service by mail where we will send your papers within twenty-four hours. It should be noted that the only difference in each level of service is the duration of the service. Our due diligence ensures that we make three attempts for every service level (in the morning, afternoon, and evening.)


A copy of the summons and petition, along with two copies of a notice and acknowledgment substantially conforming to Civil Procedure Form 4B or Civil Procedure Form 4C and a return envelope, postage prepaid and addressed to the sender, may be served by first class mail, postage prepaid, upon a resident or nonresident defendant of any class referred. Service of the summons and petition must be done as otherwise allowed by legislation or rule if no acknowledgment of service is completed and submitted to the sender. If the party served does not complete and return the notice and acknowledgment of receipt of summons within thirty days after mailing, the court will require that party to pay the costs of service unless good reason is proven for the delay. 

The person or organization being sued must be aware that a lawsuit has been filed against them. Lack of notice to a defendant precludes further legal action. It is impossible to proceed with a case against a defendant unless they have been served with the necessary legal documents. It is important to trust the process servers in Missouri you choose to serve your papers, and Undisputed Legal prides itself on being able to safeguard that trust. 

An affidavit setting forth the time, place, and manner of service, the official character of the affiant, and the affiant’s authority to serve process in civil actions within the state or territory where the service was made must be filed with the clerk or judge of the court of which the affiant is an officer or other person authorized to administer oaths in such state. The court may examine the affidavit or any other evidence to evaluate whether the service has been properly made.

A publication notice must be supported by an affidavit detailing the publication dates and newspaper used to make the publication. The affidavit that is submitted must include a copy of the notice. There must also be a certificate from the clerk stating that a copy of the petition and the notice upon order for service by publication was addressed to the defendant at the address given in the petition or the affidavit for order of publication with the date of mailing.

In the event that the service of process is unsuccessful, the document must be returned to the court within thirty days of the date of issue, together with an explanation of why it was not served. Nevertheless, the court may extend the deadline for service of process by up to ninety days from the date of issue. 


Service through personal appearance is required by a person duly authorized under the laws of the state or territory where service is made, by the deputy of a duly authorized person, or by a representative chosen by the judge presiding over the case. A copy of the service and the summons and petition will be sent to the defendant at their last known address as soon as possible by the secretary of state, secretary of the public service commission, or director of the department of insurance. The only acceptable method of service is registered or certified mail with a signed return receipt requested. If a process servers in Missouri is unable to deliver legal documents to the defendant in a case personally, they may also use the mail to fulfill that service. Depending on the specifics of that particular case, they may have to ask a court for approval. 

Where the return does not accord with the facts discovered by the court, the party being served, or any other person affecting the service, shall be authorized to prove the real circumstances of service and impeach the return. If the court determines that the facts stated in return are untrue, it may vacate the decision, alter the judgment in whole or in part as justice may demand, or take such other action as it considers fit. 

The court will not give much weight to the service if no affidavit is obtained. This will provide as tangible evidence of service but may be difficult to get without the aid of a private process servers in Missouri such as those at Undisputed Legal. A defendant’s attempts to evade service of process are well known to us, and we are prepared to counteract them. Undisputed Legal is highly adept at locating elusive defendants. Working with us, you may be certain that we will do all in our power to aid you within the bounds of the law.


Documents can be faxed at (800)296-0115, emailed to ps@undisputedlegal.com or uploaded on our website. We do require pre-payment and accept all major credit and debit cards. Once payment is processed, your sales receipt is immediately emailed for your records.

Drop-offs must call and make an appointment first to be added to building security to permit access to our office. Documents for service must be in a sealed envelope with payment in the form of a money order or attorney check (WE DO NOT ACCEPT CASH) payable to UNDISPUTED LEGAL INC.; All documents are received by our receptionist.


Alaska | Alabama | Arkansas | Arizona | California | Colorado | Connecticut | District of Columbia | Delaware | Florida | Georgia | Hawaii | Iowa | Idaho | Illinois | Indiana | Kansas | Kentucky | Louisiana | Maryland | Massachusetts | Maine | Michigan | Minnesota | Mississippi | Missouri | Montana | North Carolina | North Dakota | Nebraska | New Hampshire | New Jersey | New Mexico | Nevada | New York | Ohio | Oklahoma | Oregon | Pennsylvania | Rhode Island | South Carolina | South Dakota | Tennessee | Texas | Utah | Virginia | Vermont | Washington | West Virginia | Wisconsin | Wyoming


Albania | Andorra | Anguilla | Antigua | Argentina | Armenia | Australia | Austria | Azerbaijan | Bahamas | Barbados | Belarus | Belgium | Belize | Bermuda | Bosnia and Herzegovina | Botswana | Brazil | British Honduras | British Virgin Islands | Bulgaria | Canada | Cayman Islands | Central and Southern Line Islands | Chile|China (Macao)| China People’s Republic | Colombia | Costa Rica | Country of Georgia | Croatia | Cyprus | Czech Republic | Denmark | Dominican Republic | Ecuador | Egypt | Estonia | Falkland Islands and Dependences | Fiji | Finland | France | Germany | Gibraltar | Gilbert and Ellice Islands | Greece | Guernsey | Hong Kong | Hungary | Iceland | India | Ireland | Isle of Man | Israel | Italy | Jamaica | Japan | Jersey Channel Islands | Jordan | Kazakhstan | Korea | Kuwait | Latvia | Lithuania | Luxembourg| Malawi | Malaysia | Malta | Mauritius | Mexico| MonacoMontenegro | Montserrat | Morocco | Namibia | Netherlands | New Zealand |Nicaragua | Norway | Pakistan | Panama | Paraguay| Peru | Philippines | Pitcairn |Poland | Portugal | Republic of Moldova | Republic of North Macedonia | Romania|Russian Federation | Saint Vincent and the Grenadines | San Marino | Saudi Arabia | Serbia | Seychelles | Singapore| Slovakia | Slovenia | South Africa | Spain | Sri Lanka | St. Helena and Dependencies | St. Lucia | Sweden| Switzerland | Taiwan | Thailand | Tunisia | Turkey | Turks and Caicos Islands| UkraineUnited Kingdom of Great Britain and Northern Ireland | Uruguay | US Virgin Islands | Uzbekistan | Venezuela | Vietnam


New York: (212) 203-8001 – 590 Madison Avenue, 21st Floor, New York, New York 10022
Brooklyn: (347) 983-5436 – 300 Cadman Plaza West, 12th Floor, Brooklyn, New York 11201
Queens: (646) 357-3005 – 118-35 Queens Blvd, Suite 400, Forest Hills, New York 11375
Long Island: (516) 208-4577 – 626 RXR Plaza, 6th Floor, Uniondale, New York 11556
Westchester: (914) 414-0877 – 50 Main Street, 10th Floor, White Plains, New York 10606
Connecticut: (203) 489-2940 – 500 West Putnam Avenue, Suite 400, Greenwich, Connecticut 06830
New Jersey: (201) 630-0114 – 101 Hudson Street, 21 Floor, Jersey City, New Jersey 07302
Washington DC: (202) 655-4450 – 1101 Pennsylvania Avenue, N.W. Suite 300, Washington DC 20004

Simply pick up the phone and call Toll Free (800) 774-6922 or click the service you want to purchase. Our dedicated team of professionals is ready to assist you. We can handle all your process service needs; no job is too small or too large!  For a complete list of our Missouri Process Service Coverage Areas, Click Here!

Contact us for more information about our process-serving agency. We are ready to provide service of process to all of our clients globally from our offices in New York, Brooklyn, Queens, Long Island, Westchester, New Jersey, Connecticut, and Washington D.C.

“Quality is never an accident; it is always the result of high intention, sincere effort, intelligent direction, and skillful execution; it represents the wise choice of many alternatives”– Foster, William A


1. All applicants for process server positions in the 22nd Judicial District of the City of St. Louis are required to complete a training course taught by the City of St. Louis Sheriff (five nights of classroom instruction plus a written test). Applying individuals need to be at least 21 years old, have completed either a high school diploma programme or a General Equivalency Diploma (GED), and be completely free of any criminal records. Each process server must have Errors and Omissions Insurance with limits of at least $100,000.

2. If the verified statement includes the address of a defendant who is to be served by publication, the clerk must  mail a copy of the order of publication of notice and a copy of the petition to each such defendant within ten days after such order of publication, and  file a certificate that such copies have been mailed. 

3. A written and signed return of the time, location, and mode of service of every summons or other process handed to an official inside the state is required. If someone other than an officer serves the summons, that person must swear to the time, place, and mode of service. Proof of service must consist of an acknowledgement by the defendant that is completed if service is made.

4. A court-appointed process server must report the time, location, and circumstances of serving on an affidavit to the court hearing the case. In deciding whether or not service has been made, the court may use the affidavit or other evidence.

5. A copy of the summons and petition, together with any reimbursement set by legislation, must be sent to the secretary of state, secretary of the public service commission, or director of insurance in order to effect service of process.  

6. To the extent that it does not seem that serious injury would arise to the substantial rights of the person against whom process issued, the court may, in its discretion, let any process, return, or evidence of service thereof to be filed or changed at any time. Primary evidence of the facts stated in the return of service should be presumptive


The information contained herein has been prepared in compliance with Section 107 of the Copyright Act. Fair use is a legal doctrine that promotes freedom of expression by permitting the unlicensed use of copyright-protected works. The articles/Images contained herein serve as criticism, comment, news reporting, teaching, educational, and research-as examples of activities that qualify as fair use. Undisputed Legal Inc. is a Process Service Agency and “Not A Law Firm” therefore the articles/images contained herein are for educational purposes only, and not intended as legal advice.