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Yes! You can use AI to fill out Form AT-155, Notice of Opposition to Right to Attach Order and Claim of Exemption

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Form AT-155, Notice of Opposition to Right to Attach Order and Claim of Exemption, page 1
Moderate · 62/100Form Complexity Index

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What this form asks for

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Form AT-155, Notice of Opposition to Right to Attach Order and Claim of Exemption, is a crucial legal document used in California civil litigation. It allows a defendant to formally respond to a plaintiff's application for a pre-judgment attachment of property by stating grounds for opposition and/or claiming that specific assets are legally exempt from seizure. 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 fields66
Pages2
Sections25
Tables and lists2
Questions that depend on earlier answers21
Form Complexity IndexModerate, 62/100

The AI checks your answers before you download

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

Filer Type Mutual Exclusivity

This check ensures that the user selects only one filer type. The form provides checkboxes for 'Defendant' and 'Nondefendant' under 'Filer Information', and a user cannot be both. This validation prevents contradictory data entry, ensuring the form's logic remains intact. If both are checked, an error should prompt the user to select only one.

Conditional Filer Name Requirement

This validation enforces a conditional requirement based on the filer type selected. If the 'Defendant' checkbox is checked, the corresponding 'Defendant Name' field within the 'Filer Information (Defendant)' section must be filled. This ensures that when the filer is identified as the defendant, their name is explicitly provided in the correct context. Failure to provide the name will block submission.

Conditional Non-Defendant Information Requirement

This check validates that if the 'Nondefendant' checkbox is checked, the 'Defendant Name and Last Known Address' field is properly filled out. This is crucial for identifying the relevant defendant when the form is filed by a third party. An empty field would make the filing ambiguous, so the system must prevent submission until this information is provided.

Telephone Number Structural Integrity

This validation ensures the telephone number is entered correctly across its three separate fields: Area Code, Prefix, and Line Number. It checks that the Area Code and Prefix fields each contain exactly 3 digits, and the Line Number field contains exactly 4 digits. This prevents incomplete or malformed phone numbers, ensuring the contact information is valid and usable.

Hearing Date is in the Future

This check validates that the 'Hearing Date' entered is a valid date that occurs in the future, not in the past. Court hearings cannot be scheduled for a past date, so this logic is essential for the form's purpose. If a user enters a past date, the system should display an error message and require them to enter a valid future date.

Case Number Presence and Format

This validation ensures the 'Case Number' field is not empty, as it is a critical identifier for the legal proceeding. The check confirms that a value has been entered. This prevents the submission of a form that cannot be correctly filed or associated with its corresponding case. An error will be shown if the field is left blank.

And 8 more checks
  • Conditional Grounds for Opposition
  • Conditional Grounds for Objecting to Amount
  • Nested Exemption Claim Logic
  • Conditional Exemption Description Requirement
  • Signatory Date Validity
  • Plaintiff Name Consistency Check
  • Zip Code Format Validation
  • Total Pages Attached Must Be Numeric

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How to Fill Out AT-155 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload your Form AT-155 or select it from the template library.
  2. Provide the court, plaintiff, defendant, and case number information in the designated fields.
  3. Indicate your opposition by checking the appropriate boxes and providing detailed written grounds for opposing the attachment order or the amount sought.
  4. If claiming an exemption, check the 'CLAIM OF EXEMPTION' box and specify the property you are claiming as exempt under the relevant California Code of Civil Procedure (CCP) sections.
  5. Describe the exempt property in detail, providing any additional required information for specific exemptions like motor vehicles, tools of the trade, or property necessary for support.
  6. Enter the date, your printed name, and title to certify the information provided.
  7. Review the entire completed form for accuracy, then download the document to file with the court and serve on the plaintiff.

Common Mistakes in Completing AT-155

The ones the AI is built to catch.

Failing to Provide Details for Checked Boxes
This error occurs when a filer checks a box to oppose an order or claim an exemption but neglects to fill out the corresponding text field requiring a detailed explanation. This often happens due to simple oversight. The consequence is severe, as the opposition or exemption claim will be considered incomplete and likely disregarded by the court. To avoid this, carefully review the form and ensure every checked box, like 'Oppose Issuance on Specified Grounds', is accompanied by the required written details. AI-powered tools like Instafill.ai can help prevent this by highlighting required fields that are dependent on a checkbox being selected.
Providing Vague Descriptions for Exempt Property
When claiming property is exempt, filers often provide generic descriptions like 'my car' or 'personal items' instead of the required detailed description. This vagueness can lead a court to deny the exemption claim, allowing the plaintiff to seize the asset. To prevent this, list property with specifics, such as 'a 2018 Honda Civic, VIN...' or 'one Maytag refrigerator, model #...'. Being as descriptive as possible strengthens the legal validity of your claim.
Entering an Incorrect or Incomplete Case Number
The case number is the single most important identifier for a legal filing, and simple typos are common. Entering the wrong number can cause the document to be rejected by the court clerk, misfiled in another case, or lost entirely, leading to missed deadlines and negative rulings. Always double-check the case number against official court documents for accuracy. Using a form-filling tool like Instafill.ai can prevent this by saving and correctly auto-populating the case number across all related forms.
Incorrectly Identifying Plaintiff and Defendant
Individuals representing themselves can sometimes get confused and list their own name in the 'Defendant' field when they are the plaintiff, or vice-versa. This creates significant confusion and can lead to the form being immediately rejected by the court clerk for being improperly filled out. It is crucial to carefully read the labels and enter the correct full legal name for the party suing (Plaintiff) and the party being sued (Defendant).
Using Inaccurate or Incomplete Court Information
Filers, especially those without an attorney, may not know the precise branch name, department, or full street address of the court, leading them to enter incomplete information. This can cause the filing to be sent to the wrong location, resulting in significant delays or outright rejection. Before filling out the form, look up the exact court information on the court's official website, paying close attention to the specific branch and department handling the case.
Omitting Critical Hearing Details
When a hearing is scheduled, filers may forget to include the date, time, department, or room number on the notice. This is a critical failure that makes the notice legally deficient and can cause the other party to miss the hearing, potentially resulting in the hearing being postponed. Always verify all hearing details from the court's official notice and transcribe them accurately and completely onto the form.
Failing to Specify Exemption Code Sections
The form allows filers to claim exemptions under specific California Code of Civil Procedure (CCP) sections. A common mistake is to check the box for a general statute, like 'CCP 703.010 et seq.', but fail to provide the specific code section and a description of how it applies. This weakens the legal basis of the claim and may cause a judge to deny it. To properly make a claim, research the CCP to find the exact statute that protects your property and cite it in the provided space.
Incorrectly Filling the Filer Information Section
The section for a 'Non-Defendant' filer can be confusing, as it still requires the defendant's name and last known address. A third party, such as a bank holding the defendant's funds, might mistakenly enter their own information instead of the defendant's. This error can invalidate the filing, as the court needs to correctly identify all parties involved. Carefully read the field labels to ensure the correct person's information is entered in each box.
Incorrectly Formatting the Telephone Number
This form splits the telephone number into three separate fields: Area Code, Prefix, and Line Number. Users often try to enter the full 10-digit number into the first box or make data entry errors when tabbing between the small fields. An incorrect phone number prevents the court or opposing party from being able to make contact, so it's crucial to enter only the three-digit area code, three-digit prefix, and four-digit line number in their respective boxes. Smart tools like Instafill.ai can automatically parse and format phone numbers correctly.
Omitting the Signature and Date
Forgetting to sign and date a legal document is a simple but fatal error that invalidates the entire filing. An unsigned form will be rejected by the court, as the signature attests that the information provided is true and correct under penalty of perjury. Always perform a final review of the form before submission, specifically checking that the date is current and the signature line is properly signed. If the form is a non-fillable PDF, a tool like Instafill.ai can convert it to a fillable version where you can easily type and date before printing for signature.

Frequently Asked Questions About AT-155

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 18 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your AT-155.
Can I fill other forms too?
This plan is for your AT-155: 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 AT-155?
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 AT-155, 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 AT-155 to fill out?
AT-155 has a Form Complexity Index of 62 out of 100, in the moderate tier: 66 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 this form used for?
This form is used to formally oppose a plaintiff's request for a 'right to attach order' and to claim that certain property is exempt from being seized. It notifies the court and the plaintiff of your opposition and the legal grounds for it before a scheduled hearing.
Who needs to fill out this form?
This form should be completed by a defendant in a lawsuit, or a non-defendant who has an interest in property that the plaintiff is trying to attach. You would use this form to protect your assets from being seized to satisfy a potential judgment.
What is the difference between opposing the attachment and claiming an exemption?
Opposing the attachment challenges the plaintiff's legal right to seize any property at all. Claiming an exemption argues that even if an attachment is granted, specific pieces of your property, like your car or funds for support, are legally protected from seizure.
Where do I find the court information and case number?
The court information and case number can be found on the legal documents you received from the plaintiff, such as the summons or the application for the right to attach order. This information must match the existing case file exactly.
What if I don't know the hearing date and time?
The hearing details are critical and should be listed on the notice you received regarding the application for attachment. If you cannot find this information, contact the court clerk or the plaintiff's attorney immediately to confirm the hearing schedule.
I'm not the defendant, but the plaintiff is trying to attach my property. Can I use this form?
Yes, the form includes a section for a 'Nondefendant' to file. You must check the appropriate box and provide the defendant's name and last known address along with your own information.
How do I properly claim my property is exempt?
You must check the box to 'Claim Exemption' and then select the specific legal reason for the exemption, such as property necessary for support or items protected under a specific CCP section. You will need to describe the property in detail in the corresponding field.
What does 'CCP' mean in the exemption section?
'CCP' stands for the California Code of Civil Procedure, which contains the laws for these legal actions. The sections listed, like CCP 703.010 or 704.010, refer to specific statutes that define what property is legally exempt from seizure.
What should I do with the form after I fill it out?
After completing and signing the form, you must file the original with the court clerk at the courthouse listed on the form. You also need to 'serve' a copy on the plaintiff or their attorney before the court hearing.
The form mentions 'Total Pages Attached.' What would I be attaching?
You may need to attach additional pages if your descriptions of property or grounds for opposition do not fit in the space provided. You might also attach supporting documents, like a financial statement or evidence proving the property's exempt status.
Can I use an AI tool to help me fill out this form?
Yes, services like Instafill.ai use AI to help you accurately auto-fill form fields, which can save time and reduce errors. This is especially helpful for repetitive information like your name, address, and case details.
How can I use Instafill.ai to fill this form online?
Simply upload the form to the Instafill.ai platform. The AI will identify the fields, and you can then provide your information once to have it automatically and accurately placed throughout the document.
What should I do if my PDF version of this form is not fillable?
If you have a flat, non-fillable PDF, you can use a service like Instafill.ai. It can convert the static form into an interactive, fillable one, allowing you to easily type your information into the correct fields online.
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