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Yes! You can use AI to fill out Attachment to Proof of Service by First-Class Mail—Civil (Documents Served)

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Attachment to Proof of Service by First-Class Mail—Civil (Documents Served), page 1
Basic · 29/100Form Complexity Index

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What this form asks for

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Form POS-030(D), Attachment to Proof of Service by First-Class Mail—Civil, is a supplemental document for California court filings used with Form POS-030. It provides a detailed, itemized list of every document served on a party via first-class mail, creating an official record for the court. This ensures there is no ambiguity about what materials were included in the service. 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 fields21
Pages1
Form Complexity IndexBasic, 29/100

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.

Case Number Presence

This validation ensures that the 'Case Number' field (CaseNumber_ft) is not empty. The case number is a critical identifier that links this attachment to the correct legal case in the court's system. Failure to provide a case number would make the document impossible to file correctly, leading to its rejection by the court clerk.

Short Title Presence

This check verifies that the 'Short Title' field (Party_ft) has been filled out. The short title provides a human-readable identifier for the case, complementing the case number. Submitting the form without this information can cause delays and confusion in processing, as court staff may be unable to quickly identify the associated case.

Minimum One Document Listed

This validation confirms that at least one of the document description fields (FillText1 through FillText13) contains text. The entire purpose of this form is to list documents that were served, so an attachment with no documents listed is invalid and serves no purpose. If this check fails, the user should be prompted to either list a document or discard the attachment.

Sequential Document Listing

This check ensures that the document list is filled sequentially, without gaps. For example, 'FillText3' should not be populated if 'FillText2' is empty. This promotes clarity and standardized formatting, preventing confusion and ensuring the list of served documents is easy to read and interpret. A validation failure would prompt the user to re-order their entries.

Current Page Number Format

This validation verifies that the value entered in the 'current page' field (FillText40) is a positive integer. Page numbers must be numeric to be valid. This prevents users from entering text or symbols, which would corrupt the page numbering scheme. If validation fails, the system should reject the input and prompt for a valid number.

Total Pages Number Format

This check ensures the value in the 'total pages' field (FillText41) is a positive integer greater than zero. Like the current page number, the total must be a valid number for the pagination to make sense. This is crucial for ensuring the receiving party can confirm they have received the complete document. An invalid entry would be rejected.

And 6 more checks
  • Logical Page Numbering
  • Paired Page Numbering Fields
  • Case Number Format Plausibility
  • Meaningful Short Title
  • Document Description Specificity
  • Cross-Form Case Number Consistency

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How to Fill Out POS-030(D) Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the POS-030(D) form from the form library.
  2. Enter the Case Number and Short Title of your case into the designated header fields.
  3. In the main section, specifically describe each document that was served by first-class mail, using one line per document.
  4. If you have more documents than the form has lines, use the tool's features to add another attachment page.
  5. Carefully review the entire form to ensure the case information and the list of served documents are accurate and complete.
  6. Securely download, print, or e-file the completed POS-030(D) attachment along with your main Proof of Service form (POS-030).

Common Mistakes in Completing POS-030(D)

The ones the AI is built to catch.

Incorrect or Missing Case Number
Users often enter the case number incorrectly due to typos or by referencing an old case. This is a critical error because it prevents the court clerk from associating the attachment with the correct case file. A filing with the wrong case number will be rejected, causing delays and potentially invalidating the proof of service. Always double-check the case number against the most recent court-filed documents before submitting.
Using as a Standalone Proof of Service
A frequent misunderstanding is using this form by itself instead of as an attachment. The form's title, 'ATTACHMENT TO PROOF OF SERVICE...', clearly indicates it must accompany the main Proof of Service form (POS-030). Filing this form alone results in an incomplete and invalid proof of service, which will be rejected by the court and can lead to missed legal deadlines.
Vague or Incomplete Document Descriptions
The form requires filers to 'describe each document specifically,' but many people use generic descriptions like 'Discovery Responses' or 'Pleadings.' This ambiguity can lead to legal challenges, as the opposing party could argue it was unclear what was served. To avoid this, list the full, exact title of each document as it appears on the document itself, including any dates or identifying numbers.
Forgetting to Fill Out Header Information
Filers sometimes leave the 'Case Number' and 'Short Title' fields at the top of the attachment blank, assuming the information on the main form is sufficient. However, if pages get separated during processing, this attachment becomes an unidentifiable 'orphan' document. This will render the proof of service incomplete and cause the filing to be rejected. Always fill out the header on every single page of a court filing.
Omitting Page Numbers
The 'Page __ of __' fields at the bottom are small and easily overlooked. Failing to number the attachment page (e.g., 'Page 2 of 2') creates ambiguity about whether the filing is complete. If pages are ever separated, the court clerk will not know if they have the entire document, potentially leading to an incomplete court record. Always complete the page numbering to reflect the attachment's place in the overall document package.
Illegible Handwriting
When the form is printed and filled out by hand, poor handwriting can make the case number, party names, or document list unreadable. An illegible form is likely to be rejected by the court clerk, as they cannot accurately enter the information into the court's system. To prevent this, fill out the form electronically before printing. If you only have a non-fillable PDF, a tool like Instafill.ai can convert it into a fillable version to ensure all entries are clear and legible.
Listing Documents Redundantly
This form should only be used to list documents that do not fit on the main POS-030 form. A common error is to repeat the list of documents from the main form onto this attachment. This creates confusion and clutters the court record. Use this form exclusively for overflow, ensuring the complete list of served documents flows logically from the main form to the attachment without repetition.
Failing to Physically or Digitally Attach the Form
Simply filling out this form is not enough; it must be securely attached to the main POS-030 form it supplements. Forgetting to staple the physical copies together or merge the PDFs for e-filing will result in an incomplete submission. The court will either see a proof of service referencing a missing attachment or receive a loose attachment with no context, both of which lead to rejection.
Omitting a Served Document from the List
In the process of serving multiple documents, it's easy to accidentally forget to list one on the proof of service or its attachment. This is a serious error, as there will be no legal proof that the omitted document was ever served. This can lead to disputes, motions to compel, or the need to re-serve documents, potentially missing critical deadlines. Always use a checklist to verify every served document is listed.
Incorrectly Formatting the Document List
The form provides a series of numbered lines intended for listing individual documents. Some users ignore this structure and instead type a long, continuous paragraph of text into the first field. This makes the list difficult to read and verify, and a clerk may reject the form for not conforming to the required layout. Ensure each unique document is listed on its own separate line.
Using an Outdated Version of the Form
Courts periodically update their forms, and using an old version is a common reason for rejection. This form is dated 2005, but it's crucial to verify you have the current version before filing. Using a saved copy from an old case or an unverified online source can lead to your filing being rejected for non-compliance. Always download the latest version directly from the official judicial council or court website for your jurisdiction.

Frequently Asked Questions About POS-030(D)

 

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 POS-030(D).
Can I fill other forms too?
This plan is for your POS-030(D): 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 POS-030(D)?
You answer a few questions in plain words, or upload your W-2 or last year's return. The AI reads what you give it and puts each answer into the right field of POS-030(D), 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 POS-030(D) to fill out?
POS-030(D) has a Form Complexity Index of 29 out of 100, in the basic tier: 21 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 Form POS-030(D)?
This form is an optional attachment to Form POS-030, the Proof of Service by First-Class Mail. It is used to list all the specific documents that were served when there is not enough space on the main form.
Who needs to fill out this form?
The person who mailed the legal documents, known as the 'server,' should fill out this form. The server must be at least 18 years old and not a party to the lawsuit.
Is using Form POS-030(D) mandatory?
No, this form is designated for 'Optional Use.' You only need to use it if you are serving many documents and cannot list them all in the space provided on the main POS-030 form.
What is the difference between Form POS-030 and POS-030(D)?
Form POS-030 is the primary Proof of Service form that declares documents were mailed. Form POS-030(D) is simply an addendum to POS-030 used for the sole purpose of listing those documents in detail.
How should I describe the documents I served on this form?
You must be specific and list the exact title of each document served. For example, write 'Notice of Motion and Motion for Summary Judgment' rather than just 'Motion'.
What do I write in the 'SHORT TITLE' field?
The 'Short Title' is an abbreviated name for the case, typically listing the last names of the first plaintiff and first defendant (e.g., 'Smith v. Jones'). You can find this on any previously filed court document in your case.
What should I do if I have more documents to list than there are lines on the form?
If you run out of space, you can use a second copy of Form POS-030(D). Be sure to number the pages correctly at the top, for instance, 'Page 1 of 2' and 'Page 2 of 2'.
What do I do with this form after completing it?
After filling it out, you must attach it to the main Proof of Service form (POS-030). The combined document is then filed with the court, and you should serve a copy on the other parties.
Can I file Form POS-030(D) by itself?
No, this form is an attachment and has no legal effect on its own. It must always be attached to a completed and signed Proof of Service form, such as POS-030.
Can AI tools help me fill out this form?
Yes, services like Instafill.ai use AI to auto-fill form fields accurately and save time. It can pull information like the case number and short title from your other case documents to ensure consistency.
How can I fill out Form POS-030(D) online?
You can use a service like Instafill.ai to easily complete this form online. Simply upload the PDF, and the platform allows you to type directly into the fields before downloading the finished document.
The PDF of this form I have is not fillable. What can I do?
If you have a non-fillable or 'flat' PDF, you can upload it to Instafill.ai. The service can convert the static document into an interactive, fillable form that you can complete on your computer.
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