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Yes! You can use AI to fill out Form MC-031, Attached Declaration

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Form MC-031, Attached Declaration, page 1
Simple · 28/100Form Complexity Index

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What this form asks for

The AI fills all of it, from your answers or your documents.

Form MC-031, Attached Declaration, is a legal document used in California courts to supplement other filings with a personal statement made under penalty of perjury. This form allows a party or their attorney to provide factual information to the court as part of a motion or other legal paper, ensuring the information is formally sworn to be true. Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields18
Pages1
Sections4
Questions that depend on earlier answers1
Form Complexity IndexSimple, 28/100

The AI checks your answers before you download

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

Ensures Case Number is Provided

This check verifies that the 'CASE NUMBER' field is not empty. The case number is a critical identifier for associating the declaration with the correct legal proceeding in the court's filing system. If this field is left blank, the document cannot be correctly docketed and may be rejected by the court clerk.

Validates Plaintiff/Petitioner Name Presence

This validation ensures that the 'PLAINTIFF/PETITIONER' field contains a name. Identifying the primary parties is fundamental for any legal document. A missing plaintiff or petitioner name makes the document ambiguous and legally insufficient, leading to rejection or delays in the case.

Validates Defendant/Respondent Name Presence

This validation ensures that the 'DEFENDANT/RESPONDENT' field contains a name. Similar to the plaintiff/petitioner, identifying the opposing party is essential for the document's validity and for proper notification. An empty field would render the declaration contextually incomplete and cause filing issues.

Verifies Declaration Content Exists

This check confirms that the main declaration text body is not empty. The entire purpose of the MC-031 form is to provide a sworn statement of facts, so a blank declaration has no legal value. Submission of a form without the actual declaration content would be pointless and would be rejected.

Validates Declaration Date Format and Plausibility

This check ensures the 'Date' field is filled with a valid date in a recognized format (e.g., MM/DD/YYYY) and that the date is not in the future. The date of the declaration is legally significant as it establishes when the statement was made under penalty of perjury. An invalid or future date would call the document's authenticity into question.

Ensures Declarant's Printed Name is Provided

This validation verifies that the '(TYPE OR PRINT NAME)' field is completed. This field clearly identifies the person making the declaration (the declarant), correlating the signature with a specific individual. A missing printed name can create ambiguity about the signer's identity, potentially invalidating the declaration.

And 6 more checks
  • Requires Declarant Role Selection
  • Prevents Mutually Exclusive Role Selections
  • Conditional Requirement for 'Other' Role Specification
  • Validates Signature Field Completion
  • Attachment Status Acknowledgment
  • Dependency Check for 'Other' Role Text Field

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How to Fill Out MC-031 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload your MC-031 form or select it from the platform's library of official documents.
  2. Enter the case information, including the names of the Plaintiff/Petitioner, Defendant/Respondent, and the Case Number in the designated fields.
  3. Type or paste the full text of your declaration into the main content area of the form. This is the statement you are making under penalty of perjury.
  4. Indicate your role in the case by checking the appropriate box (e.g., Plaintiff, Defendant, Attorney, etc.).
  5. Enter the date of signing and provide your printed name and signature in the specified sections.
  6. Review the entire completed form to ensure all information, especially the declaration text and personal details, is accurate and complete.
  7. Download the finalized MC-031. Remember, this form must be attached to another court paper before it can be filed with the court.

Common Mistakes in Completing MC-031

The ones the AI is built to catch.

Filing the Declaration as a Standalone Document
A primary mistake is filing this form by itself, without the main document it's supposed to support. The form explicitly states it must be attached to another court paper, such as a motion or request. Filing it alone will result in immediate rejection by the court clerk, delaying your case. Always ensure the MC-031 is physically or electronically attached to the primary document you are filing.
Incomplete or Incorrect Case Information
Users often enter the Plaintiff/Defendant names or the Case Number with typos, or leave them blank entirely. This happens due to carelessness or not having the correct information readily available. An incorrect case caption can cause the document to be misfiled in the wrong case or rejected outright, leading to critical delays. To avoid this, carefully copy the information exactly as it appears on a court-stamped copy of the Complaint or Petition.
Missing Signature or Date
Forgetting to sign or date the declaration is a frequent and critical error, often made in haste. An unsigned or undated declaration is legally invalid and holds no weight in court, as it lacks the formal attestation under penalty of perjury. This will lead to the court disregarding your statement and may require you to refile, causing delays. Always perform a final check for a valid signature and the correct date before submission.
Including Opinions or Hearsay Instead of Facts
Declarations must be based on the declarant's personal knowledge, meaning things they personally saw, heard, or did. A common error is to include personal opinions, speculation, or what someone else said (hearsay). These statements are inadmissible in court and will be ignored by the judge, severely weakening the argument the declaration is meant to support. Stick strictly to factual statements you can personally attest to.
Incorrectly Identifying the Declarant's Role
The form requires you to check a box identifying your role (e.g., Plaintiff, Defendant, Attorney). People sometimes check the wrong box, multiple boxes, or forget to check one at all. This creates confusion for the court about who is making the statement and from what perspective. Carefully select the single box that accurately describes your relationship to the case to ensure your declaration is properly understood.
Illegible Handwriting or Unclear Printed Name
When filling out the form by hand, handwriting can be difficult to read, and the printed name below the signature may be illegible. This makes it difficult for the court to identify the declarant, potentially casting doubt on the document's authenticity. To prevent this, it is highly recommended to type the information. If the form is a non-fillable PDF, tools like Instafill.ai can convert it into a fillable version, ensuring all text is clear and professional.
Improperly Attaching and Numbering Additional Pages
The space provided is often insufficient, requiring additional pages. A mistake is to simply attach extra blank pages without proper identification. This can lead to pages being lost or their order being confused. Each continuation page must include the case name, case number, and be numbered sequentially (e.g., 'Page 2 of 3 of Attached Declaration') to create a single, cohesive document.
Failing to Adequately Specify the 'Other' Role
If the person signing is not a party or attorney, they must check the 'Other' box and specify their role. A common mistake is to leave the specification line blank or write something vague. This is insufficient, as the court needs to understand the declarant's standing (e.g., 'Custodian of Records,' 'Third-Party Witness,' 'Spouse of Petitioner'). Failing to specify the role clearly can diminish the declaration's credibility.
Using an Obsolete Version of the Form
Judicial Council forms are updated periodically, and courts require the use of the most current version. This form is dated 2005, but for other forms, using an outdated revision can lead to rejection by the clerk. This mistake happens when people use old saved files or find incorrect versions online. Always download the latest version of any form directly from the official California Courts website before you begin.
Incorrectly Formatting Party Names
Litigants representing themselves often just write personal names, but court captions require specific legal formatting (e.g., 'Jane Doe' vs. 'Jane Doe, an individual'; 'ABC Company' vs. 'ABC Company, a Delaware Corporation'). While not always fatal, incorrect formatting looks unprofessional and can create ambiguity. For consistency and accuracy, use an AI-powered tool like Instafill.ai, which can save and correctly auto-populate party information across all your legal forms.

Frequently Asked Questions About MC-031

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 4 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your MC-031.
Can I fill other forms too?
This plan is for your MC-031: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
How do I cancel?
From your account, in two clicks, any time. No email, no call.
How does the AI fill out MC-031?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of MC-031, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is MC-031 to fill out?
MC-031 has a Form Complexity Index of 28 out of 100, in the simple tier: 18 fillable fields across 1 page. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of the Attached Declaration form (MC-031)?
The MC-031 form is used to provide a sworn statement or additional information to the court. It's a general-purpose declaration that must be attached to another legal form that requires more explanation than the space on that form allows.
Who needs to fill out an Attached Declaration?
Anyone involved in a California court case (like a plaintiff, defendant, or petitioner) who needs to provide a sworn statement or extra details to support a motion or other court filing can use this form.
How do I file the Attached Declaration form?
This form cannot be filed by itself. As its name suggests, you must attach it to the primary court form or document it is supporting before filing the entire package with the court.
What information do I need to provide on Form MC-031?
You must provide the case information (plaintiff/petitioner, defendant/respondent, and case number), your written statement, the date, and your signature. You also need to check the box that correctly identifies your role in the case.
What does 'I declare under penalty of perjury' mean?
This is a legally binding statement confirming that everything you have written in the declaration is true and correct to the best of your knowledge. Knowingly providing false information on a declaration is a serious crime.
What if I need more space than what is provided on one MC-031 form?
If your declaration is longer than one page, you can use additional MC-031 forms. Simply number each page sequentially (e.g., 'Page 1 of 3', 'Page 2 of 3') and ensure the case information is included on every page.
The form says 'Approved for Optional Use.' What does that mean?
This means that while the Judicial Council has approved this form's format, you are not strictly required to use it. However, using Form MC-031 is highly recommended as it ensures you include all the necessary legal language and formatting required by the court.
How should I write my statement in the main declaration section?
Clearly and concisely state the facts you want the court to know, presenting them in a logical order. It is best practice to number your paragraphs to make your statement easy for the judge to read and reference.
Can an AI tool help me fill out the Attached Declaration form?
Yes, AI-powered services like Instafill.ai can help you fill out this form quickly and accurately. These tools can auto-fill repetitive information like your case number and party names, saving you time and reducing errors.
How can I use Instafill.ai to complete Form MC-031 online?
Simply upload the MC-031 PDF to the Instafill.ai platform. The AI will identify the form fields, allowing you to type your information directly into your browser and then save, print, or download the completed document.
The PDF version of Form MC-031 I found is not fillable. What can I do?
If you have a non-fillable or 'flat' PDF, you can use a service like Instafill.ai. Its technology can convert the static PDF into an interactive, fillable form online, so you can easily type in your information without needing to print and write by hand.
How do I sign the form if I fill it out on a computer?
After filling out the form electronically, you must print it and sign it with a pen. For most court filings, an original 'wet' signature is required unless you are using an approved e-filing system with specific rules for electronic signatures.
Where do I find the case number for the form?
The case number is a unique identifier assigned by the court when the case was first filed. You can find it on any previous documents you have filed or received from the court related to your case.
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