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Yes! You can use AI to fill out Judicial Council of California Form SC-104, Proof of Service (Small Claims)

Q: How complex is SC-104 to fill out?

SC-104 has a Form Complexity Index of 52 out of 100 (moderate tier), calculated deterministically from the form structure: 60 fillable fields across 2 pages, 14 sections, 23 conditional fields. A base score weighs field count (36%), input difficulty by field type (26%), page count (15%), conditional logic (16%) and structure (7%), then adds modifiers for tables, instruction pages and layout density. The Instafill AI fills SC-104 accurately in under a minute.

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Judicial Council of California Form SC-104, Proof of Service (Small Claims), page 1

Moderate · 52/100Form Complexity Index

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What this form asks for

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SC-104, Proof of Service (Small Claims), is an optional Judicial Council of California form that a server completes after delivering small claims documents to the other party. It records the recipient’s identity, the documents served, and whether service was personal or substituted, including required mailing details for substituted service. The form is important because the court generally cannot move forward unless there is valid proof that the opposing party was served according to California law. The server signs under penalty of perjury, making accuracy critical.

Fillable fields60

Pages2

Sections14

Questions that depend on earlier answers23

Form Complexity IndexModerate, 52/100

The AI checks your answers before you download

16 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Court Venue Completeness (County and Address)

Validates that the Superior Court county name is provided and that the court street address field is not left blank. This is important because the proof of service must be tied to the correct court location for filing and case tracking. If missing or incomplete, the submission should be rejected or flagged because the court cannot reliably associate the proof with the proper venue.

Case Identifier Completeness (Case Number and Case Name)

Checks that both the Case Number and Case Name fields are present and non-empty, and that the case number matches an expected pattern (e.g., alphanumeric with dashes as used by the county). These identifiers are essential to link the proof of service to the correct small claims matter. If validation fails, the form should be returned for correction because mis-association can invalidate filing or cause service to be credited to the wrong case.

Hearing Schedule Fields Validity (Date, Time, Department)

Ensures Hearing Date is a valid calendar date, Time is in a valid time format (with a.m./p.m. if required), and Department is provided when applicable. This matters because the form instructions require filing at least 5 days before the hearing, and the court uses these fields to confirm timeliness. If invalid or missing, the system should flag the submission as incomplete and potentially noncompliant with filing deadlines.

Served Party Type Consistency (Person vs. Business/Entity)

Validates that the form is completed for exactly one served party type: either item 1(a) (person’s name) or item 1(b) (business/entity name plus authorized person and job title). This prevents ambiguity about who was served and whether service was directed to an authorized recipient. If both are filled or both are blank, the submission should be rejected because the served party cannot be determined.

Business/Entity Service Authorization Details

When serving a business or public entity, checks that Business/Agency Name, Person Authorized for Service, and Job Title are all provided and not placeholders (e.g., 'N/A'). This is important because service on an entity is only valid if delivered to an appropriate authorized individual. If missing, the system should flag the service as potentially invalid and require correction before filing.

Documents Served Selection (At Least One Document Checked)

Ensures at least one document in section 3 is selected (SC-100, SC-120, Order for Examination forms, or 'Other' with specification). Proof of service must identify exactly what papers were delivered to establish notice and due process. If none are selected, the submission should be rejected because it does not prove what was served.

And 10 more checks

Other Document Specification Required When 'Other' is Checked
Service Method Exclusivity (Personal vs. Substituted)
Personal Service Details Completeness and Format
Substituted Service Recipient Category and Recipient Identification
Substituted Service Mailing Step Completeness and Chronology
SC-104A Attachment Requirement for Third-Party Mailing
Address Validation Rules (No U.S. P.O. Box Where Prohibited)
Server Eligibility Attestation and Case-Party Exclusion
Server Information Completeness and Contact Format
Registered Process Server Fields Conditional Requirement

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How to Fill Out SC-104 Online for Free in 2026

What the AI walks you through.

Enter the court information and case details (county, case number, case name, hearing date/time/department).
Identify who was served: either the individual’s name or the business/public entity name plus the authorized person for service and their job title.
Select and list the exact documents served (e.g., SC-100, SC-120, order for examination forms, and/or other specified documents).
Choose the service method and complete the appropriate section: Personal Service (date/time/address) or Substituted Service (who received the papers, date/time/address, and the name/description of the recipient).
If substituted service was used, complete the mailing details (date mailed, city/state mailed from, and how the envelope was deposited/mailed; attach SC-104A if someone else mailed it).
Complete the server’s information (name, phone, address, service fee, and process server registration details if applicable).
Sign and date the declaration under penalty of perjury, then return the completed form to the requesting party so it can be filed with the court at least 5 days before the hearing.

Common Mistakes in Completing SC-104

The ones the AI is built to catch.

Leaving court and case header fields blank or inconsistent

People often skip the top section (county, case number, case name, hearing date/time/department) because they assume the clerk will fill it in or they don’t have the notice in front of them. Missing or mismatched header information can cause the proof of service to be rejected or misfiled, and it can create confusion about which hearing the service relates to. Copy these fields exactly from the court’s notice or the filed claim, and double-check spelling and numbers match the case caption.

Listing the wrong person/business in Item 1

A frequent error is writing the plaintiff’s name, the server’s name, or a nickname instead of the exact person or entity that is being served. If the served party is not correctly identified, the court may find service invalid and continue the hearing or dismiss the claim. Use the exact legal name from the SC-100/SC-120 and, for businesses, include both the business name and the specific authorized person and job title.

Serving a business without naming an authorized recipient and title

Many filers write only the business name and omit the “Person Authorized for Service” and “Job Title,” or they serve a random employee (e.g., cashier) who is not authorized. This can invalidate service because California rules require service on an owner/partner/officer/general manager/authorized agent (or agent on file with the Secretary of State). Before serving, confirm who is authorized (e.g., via Secretary of State business search) and record the recipient’s name and title on the form.

Using substituted service incorrectly (wrong recipient or wrong location)

People often check substituted service but leave papers with someone who is under 18, not living at the home, or not actually “in charge” at the workplace/mail location. Substituted service has strict requirements, and mistakes can lead to a challenge that service was improper, delaying the case. Only use substituted service when the recipient fits the form’s categories, and document the relationship/role and the exact address where service occurred.

Forgetting the required follow-up mailing after substituted service

A very common mistake is completing substituted service (leaving papers with an adult) but not mailing a copy afterward, or not filling out the mailing details (date, city/state, and method). Without the mailing step, substituted service is incomplete and may be deemed invalid. Always mail the copies promptly after leaving them, then complete every mailing line and check the correct mailing method box.

Checking the wrong documents served (or not specifying “Other”)

Servers sometimes check SC-100 when they actually served SC-120, forget to check any boxes, or write “Other” without specifying what was served. If the proof of service doesn’t match what was delivered, the court may not accept it or the opposing party may claim they were not properly notified. Compare the packet served to Item 3 and check every applicable box; if it’s not listed, clearly specify the document name and form number under “Other (specify).”

Attempting substituted service for documents that require personal service

Orders for examination (e.g., SC-134 or AT-138/EJ-125) have special service requirements, and people sometimes use substituted service or have an ineligible person serve them. This can prevent enforcement and, for certain consequences (like a civil arrest warrant), the court may require personal service by a registered process server, sheriff, marshal, or court-appointed person. Read the note on the form carefully and ensure the correct service method and qualified server are used for examination orders.

Incomplete or inaccurate date/time/address details for service

It’s common to omit the time, forget to mark a.m./p.m., provide an incomplete address, or list a mailing address instead of the actual location where papers were handed/left. These details are used to evaluate whether service was timely and properly performed, and missing information can lead to rejection or a credibility issue if service is disputed. Record the exact date, exact time with a.m./p.m., and the full street address, city, state, and ZIP where service occurred.

Not identifying the substituted-service recipient (name/description) clearly

When substituted service is used, people often leave blank the “Name or description of the person I gave the papers to,” or they write something vague like “front desk.” If the served party challenges service, the court needs enough detail to assess whether the recipient was a competent adult and appropriate for substituted service. Write the person’s full name if possible, or a detailed description (approximate age, role, relationship, and where they were encountered).

Server eligibility errors (party to the case, under 18, or missing server info)

A frequent mistake is having a plaintiff/defendant serve the papers, using someone under 18, or failing to complete the server’s name, address, and phone number. If the server is not eligible or cannot be contacted, the proof of service may be invalid and the hearing may be continued. Use a neutral adult (18+) not named in the case, and fully complete the server information section, including process server registration details if applicable.

Missing signature, printed name, or perjury declaration date

People often forget to sign, forget to type/print the server’s name, or leave the declaration date blank—especially when the form is filled out before service occurs. An unsigned or undated proof of service is typically not accepted because it is a declaration under penalty of perjury. Complete the form only after service is done, then sign, print/type the server’s name, and enter the correct date of signing.

Not meeting the filing deadline (proof of service filed too late)

Servers sometimes return the form late or the requesting party files it fewer than 5 days before the hearing, often due to misunderstanding the timeline or waiting until the last minute to serve. Late filing can result in the hearing being postponed or the court refusing to proceed because service cannot be confirmed. Serve early, return the completed SC-104 immediately, and plan backward from the hearing date to ensure the proof is filed at least 5 days in advance.

Frequently Asked Questions About SC-104

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How complex is SC-104 to fill out?

SC-104 has a Form Complexity Index of 52 out of 100, in the moderate tier: 60 fillable fields across 2 pages. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.

What is Form SC-104 (Proof of Service—Small Claims) used for?

Form SC-104 is used to prove to the court that the required small claims papers were delivered (“served”) to the other party. The court generally cannot proceed unless service is properly completed and documented.

Who should fill out and sign Form SC-104?

The person who actually served the papers (the “server”) must complete and sign the form. The server must be at least 18 years old and cannot be named in the case.

When does the Proof of Service need to be filed with the court?

The completed Proof of Service must be filed with the court at least 5 days before the hearing. The server should return it to the person who requested service early enough to meet that deadline.

What information do I need to fill in at the top of the form?

You must enter the court name and address, the case number, case name, and the hearing date, time, and department. This information should match the small claims paperwork being served.

How do I complete item 1 if I’m serving an individual person?

In item 1(a), write the person’s name exactly as it appears on the court papers. This is the person who is being served.

How do I complete item 1 if I’m serving a business or public entity?

In item 1(b), list the business/agency name, the person authorized to accept service, and that person’s job title. The form also lists examples of who can be served for businesses (e.g., owner, partner, officer, general manager, or authorized agent).

Who can be served on behalf of a business?

You must serve an appropriate person such as the owner (sole proprietorship), a partner/general partner, an officer or general manager, or an authorized agent (including an agent on file with the Secretary of State for certain entities). Serving the wrong person can make service invalid.

Are there special rules for serving a public entity (like a city or county)?

Yes—before serving a public entity, you must first file a claim with that entity. Then you may serve the clerk, chief officer/director, or another person authorized to accept service for the entity.

What documents do I list in item 3?

Check the boxes for the exact documents you served, such as SC-100 (Plaintiff’s Claim), SC-120 (Defendant’s Claim), or an order for examination (SC-134 or AT-138/EJ-125). If you served something else, check “Other” and specify what it was.

What is the difference between Personal Service and Substituted Service on this form?

Personal Service means you handed the documents directly to the person named in item 1. Substituted Service means you left the documents with an eligible adult at the person’s home, workplace, or usual mailing location (as described on the form) and then mailed a copy to the person.

If I use Substituted Service, do I have to mail a copy too?

Yes. After leaving the papers with the eligible adult, you must mail copies to the person in item 1 at the address where you left the documents, using first-class prepaid postage, and complete the mailing details on the form.

Can I use a U.S. Post Office box for substituted service?

Not a U.S. Post Office box. The form allows substituted service at a place where the person usually receives mail only if it is not a U.S. Post Office box (for example, a private mailbox), and only if there is no known physical address.

What details must the server include about when and where service happened?

The server must provide the date, time (a.m./p.m.), and the full address (including city, state, and zip) where the papers were delivered. For substituted service, the server must also describe the person who received the papers and complete the mailing section.

What is the “Order for examination” note about personal service and arrest warrants?

The form warns that an order for examination must be personally served. It also notes the court can issue a civil arrest warrant for failure to appear only if personal service was done by a registered process server, sheriff, marshal, or someone appointed by the court.

What is Form SC-104A and when do I attach it?

If someone else mails the documents for substituted service (instead of the server), that person must complete Form SC-104A. You attach the completed SC-104A to SC-104 to document the mailing.

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small claims forms: Form SC-100, Plaintiff's Claim and ORDER to Go to Small Claims Court, SC-108, Request to Correct or Cancel Judgment and Answer (Small Claims), Judicial Council of California Form SC-105, Request for Court Order and Answer (Small Claims), SC-120, Defendant’s Claim and ORDER to Go to Small Claims Court (Small Claims), Judicial Council of California Form SC-104, Proof of Service (Small Claims), Judicial Council of California Form SC-108, Request to Correct or Cancel Judgment and Answer (Small Claims), SC-105, Request for Court Order and Answer (Small Claims), Judicial Council of California Form SC-120, Defendant’s Claim and ORDER to Go to Small Claims Court (Small Claims), Form SC-100, Plaintiff’s Claim and ORDER to Go to Small Claims Court, Form N161, Appellant’s notice (All appeals except small claims track appeals and appeals to the Family Division of the High Court), Plaintiff's Claim and ORDER to Go to Small Claims Court (SC-100), Form N161, Appellant's Notice (All appeals except small claims track appeals and appeals to the Family Division of the High Court), Form SC-100A, Other Plaintiffs or Defendants (Attachment to Plaintiff's Claim and ORDER to Go to Small Claims Court), Form A, Claim Form, European Small Claims Procedure, Form EJ-001, Abstract of Judgment—Civil and Small Claims, Form SC-109, Authorization to Appear (Small Claims), Form SC-112A, Proof of Service by Mail (Small Claims), Form SC-114, Request to Amend Party Name Before Hearing (Small Claims), Form SC-132, Attorney-Client Fee Dispute (Attachment to Notice of Entry of Judgment), Form SC-152, Order on Request to Postpone Trial (Small Claims)

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proof of service forms: Form POS-040, Proof of Service—Civil, Judicial Council of California Form SC-104, Proof of Service (Small Claims), Form DV-200, Proof of Personal Service (CLETS) (Domestic Violence Prevention), Illinois Circuit Court Eviction Summons and Proof of Service of Eviction Summons & Eviction Complaint (Form E-S 3507.3), proof-of-electronic-service-appellate, Form APP-009, Proof of Service (Appellate Division), Form APP-109, Proof of Service (Appellate Division), Form GC-020(P), PROOF OF PERSONAL SERVICE OF NOTICE OF HEARING— GUARDIANSHIP OR CONSERVATORSHIP, Form APP-109E, Proof of Electronic Service (Appellate Division), Proof of Personal Service of Notice of Initial Appearance—CARE Act Proceedings, Form CARE-116, Proof of Personal Service of Notice of Hearing—CARE Act Proceedings, Form CR-106, Proof of Service — Criminal Record Clearing, CARE-107, Proof of Personal Service of Notice of Order for CARE Act Report, Form CIV-120, Notice of Entry of Dismissal and Proof of Service, Form DAL-012, Proof of Service—Disability Access Litigation, Form DE-120(P), Proof of Personal Service of Notice of Hearing—Decedent's Estate or Trust, Form EA-200, Proof of Personal Service (Elder or Dependent Adult Abuse Prevention), Form EA-260, Proof of Service of Order After Hearing by Mail (Elder or Dependent Adult Abuse Prevention), Form FL-115, Proof of Service of Summons (Family Law—Uniform Parentage—Custody and Support), Form CR-401, Proof of Service for Petition/Application Under Health and Safety Code Section 11361.8—Adult Crimes

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