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Yes! You can use AI to fill out Judicial Council of California Form UD-105, Answer—Unlawful Detainer

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Judicial Council of California Form UD-105, Answer—Unlawful Detainer, page 1
Complex · 64/100Form Complexity Index

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What this form asks for

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Form UD-105 (Answer—Unlawful Detainer) is the official California Judicial Council pleading a tenant/defendant files to respond to an unlawful detainer complaint. It allows the defendant to choose a general or specific denial, assert legally recognized defenses (including habitability, retaliation, discrimination, rent control, Tenant Protection Act, and certain COVID-19 and CARES Act-related defenses), and request outcomes such as dismissal, costs, attorney’s fees, or repair/rent reduction orders. Filing a complete and accurate Answer is important because it preserves defenses and formally contests the eviction in court. 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 fields211
Pages5
Sections24
Questions that depend on earlier answers18
Form Complexity IndexComplex, 64/100

The AI checks your answers before you download

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

Case Number present and matches allowed court case-number pattern

Validate that the Case Number field is not blank and contains only characters typically allowed in California court case numbers (letters, numbers, spaces, dashes, and leading zeros). This is critical for correct filing, routing, and matching the answer to the correct unlawful detainer case. If the value is missing or contains disallowed characters, the submission should be rejected or flagged for manual review because it may not be accepted by the court or may be misfiled.

Party names (Plaintiff/Defendant) are complete and consistent across header and Item 1

Ensure Plaintiff and Defendant names in the case caption are provided and that the defendant(s) listed in Item 1 (Defendant(s) answering) are also present and not contradictory to the caption defendant. This prevents ambiguity about who is answering and ensures the answer is properly attributed to the correct parties. If Item 1 is blank or lists names that do not match/relate to the caption defendants, the system should require correction or route to review.

Attorney vs. self-represented fields completeness and dependency enforcement

If a State Bar Number is provided (or an attorney name is indicated), require attorney-related fields to be coherent: attorney name, firm (if applicable), and “Attorney for” should be completed and “Attorney for” should not be blank. If the filer is a party without an attorney, allow State Bar Number and “Attorney for” to be blank but require the party name and mailing address/phone. If these dependencies are violated, the submission should fail validation because service and representation status will be unclear.

State Bar Number format validation (if provided)

Validate that the State Bar Number contains only digits and is within a reasonable length range used by the California State Bar (commonly 4–6 digits, but allow configurable range). This reduces data-entry errors and helps downstream integrations or lookups. If the format is invalid, the system should prompt for correction or flag the record for review rather than silently accepting a malformed identifier.

Contact information format checks (phone, fax, email) with required minimums

Validate telephone and fax numbers (if provided) for valid North American numbering format (10 digits, allowing punctuation like parentheses/dashes) and validate email address syntax (single @, valid domain, no spaces). At least one reliable contact method should be present for the filer (typically telephone; email if used for service). If formats are invalid or required contact is missing, the submission should be blocked because notices and communications may fail.

Mailing address completeness and ZIP code format validation

Require Street Address, City, State, and ZIP Code for the attorney/party section, and validate ZIP as 5 digits or ZIP+4 (##### or #####-####). This is important for service, correspondence, and court records accuracy. If any required address component is missing or ZIP is malformed, the system should fail validation and request correction.

And 12 more checks
  • Denials selection is mutually exclusive (General vs. Specific)
  • General Denial eligibility check against complaint amount (if amount captured)
  • Specific Denials require at least one substantive denial entry or attachment reference
  • UD-101 denial logic: “Did not receive UD-101” vs. (b)/(c)/(d) completion consistency
  • Defense selections require supporting facts in Item 3w or MC-025
  • Defense c date required and must be a valid date
  • Local ordinance defense (3g) requires ordinance identification details
  • Other statements/requests text required when “Other” is selected (Items 4c and 5e)
  • Vacated premises date validation (Item 4a) and logical consistency
  • Unlawful Detainer Assistant section completeness and expiration date validity
  • Signature and verification completeness for all answering defendants
  • Number of pages attached is numeric and matches attachment indicators

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How to Fill Out UD-105 Online for Free in 2026

What the AI walks you through.

  1. Go to Instafill.ai and upload the UD-105 PDF (or search/select “UD-105 Answer—Unlawful Detainer” from the form library).
  2. Enter the case caption details: court county/branch and address information, case number, and the plaintiff and defendant names exactly as shown on the complaint.
  3. Provide attorney/party contact information (or indicate you are self-represented), including address, phone, and email for service.
  4. Complete Item 2 (Denials) by selecting either General Denial (if allowed) or Specific Denials, and use Instafill.ai to draft/insert the paragraph-based explanations and add MC-025 attachments when more space is needed.
  5. Complete Item 3 (Defenses and Objections) by checking all applicable defenses and using Instafill.ai to generate concise supporting facts for Item 3w and any required attachments (MC-025).
  6. Complete Items 4–6 (Other statements, requests, and number of pages attached), then complete the Unlawful Detainer Assistant section (Item 7) if applicable.
  7. Review for consistency, then e-sign/prepare signatures and verification, download the finalized form and attachments, and file/serve according to the court’s unlawful detainer procedures and deadlines.

Common Mistakes in Completing UD-105

The ones the AI is built to catch.

Using the wrong case number format (missing letters/dashes/leading zeros)
People often copy the case number from the wrong document, omit leading zeros, or drop suffix letters and dashes because they seem “optional.” A mismatched case number can cause the clerk to reject the filing or misfile it under a different case, delaying your response. Always copy the case number exactly as it appears on the summons/complaint (including spaces, dashes, and letters). AI-powered tools like Instafill.ai can help by preserving exact formatting and validating that the case number field isn’t altered.
Not naming and signing for every defendant who is answering (Item 1 + signatures)
A very common error is listing only one defendant in Item 1 even though multiple defendants were named in the complaint, or having only one person sign when multiple defendants are filing a joint answer. The form explicitly requires that all defendants for whom the answer is filed must be named and must sign (unless an attorney signs), and missing names/signatures can lead to an incomplete answer for some defendants and potential default risk. Double-check the complaint caption and ensure every answering defendant is listed in Item 1 and signs in the signature/verification sections. Instafill.ai can prompt for all named defendants and flag missing signature lines before you finalize.
Checking both ‘General Denial’ and ‘Specific Denials’ (or checking the wrong one)
Item 2 requires checking ONLY ONE box, but filers often check both to “cover all bases,” or they choose General Denial even when the complaint demands more than $1,000. This can make the answer internally inconsistent and may result in rejection or weaken the response because required specific denial details are missing. Confirm the amount demanded in the complaint: if it’s more than $1,000, use Specific Denials and complete the required subparts; otherwise, General Denial may be appropriate. Instafill.ai can enforce the “only one” rule and guide the selection based on the complaint amount you enter.
Selecting ‘Specific Denials’ but leaving required sub-items blank (2b(1) and 2b(2))
When people check Specific Denials, they often forget to complete the follow-up sections identifying what is denied in the complaint (UD-100) and in UD-101, or they provide vague statements without paragraph references. The consequence is an incomplete or unclear denial that may not properly put allegations in dispute and can create procedural problems. Avoid this by listing paragraph numbers from the complaint/UD-101 and clearly stating whether you deny as false or deny for lack of information, using MC-025 if needed. Instafill.ai can remind you which sub-items become mandatory once Specific Denials is selected and can format paragraph references consistently.
Referencing MC-025 attachments incorrectly (wrong attachment title or missing pages)
This form repeatedly instructs you to use MC-025 and to title attachments precisely (e.g., “Attachment 2b(1)(a),” “Attachment 3w”), but many filers either forget to attach MC-025, use the wrong title, or don’t match the attachment to the checkbox they selected. Courts can treat the answer as unsupported or incomplete if the referenced attachment isn’t actually included or is mislabeled. Always attach MC-025 when you check an “Explanation is on MC-025” box, and label each attachment exactly as the form specifies. Instafill.ai can generate properly titled attachments and help ensure the referenced pages are actually included in the final packet.
Checking defenses without providing supporting facts in Item 3w
A frequent mistake is checking multiple defenses in Item 3 (habitability, retaliation, rent control, TPA, COVID-related defenses, etc.) but leaving Item 3w blank or writing only conclusions like “landlord is retaliating.” The form requires brief facts for each checked defense, and missing facts can make defenses ineffective and easier for the plaintiff to challenge. For every box you check, add short, specific facts (dates, notices received, payments offered, conditions, communications) in 3w or on MC-025. Instafill.ai can prompt you to enter at least one fact per selected defense and keep the narrative organized by defense letter.
Using ‘Nonpayment of rent only’ defenses in the wrong type of case
Defenses 3a–3c are explicitly limited to nonpayment-of-rent cases, but people often check them in holdover, breach-of-lease, nuisance, or no-fault termination cases because the issues feel relevant. Checking inapplicable defenses can confuse the court and distract from stronger, relevant defenses, and it may signal that the answer was not carefully prepared. Verify the basis for eviction stated in the complaint and notice (e.g., 3-day pay or quit vs. 3-day perform or quit vs. 30/60-day notice) before selecting these defenses. Instafill.ai can help by asking what type of notice/complaint you received and warning when a defense is typically limited to nonpayment cases.
Leaving required dates blank (rent offer date, vacate date, verification date)
Several sections require dates (e.g., Defense 3c rent-offer date, Item 4a vacate date, and the Verification date), and people commonly skip them or write approximate timeframes. Missing or unclear dates can undermine credibility and make it harder to evaluate defenses tied to statutory deadlines and notice periods. Use exact dates whenever possible and cross-check them against notices, receipts, texts/emails, and court papers. Instafill.ai can standardize date formatting and flag missing date fields that become required based on boxes you checked.
Misunderstanding UD-101-related denials (not indicating receipt vs. denying specific statements)
In Item 2b(2), filers often check “did not receive UD-101” even when they did receive it, or they fail to complete (b) and (c)/(d) when they do not check the “did not receive” box. This creates logical gaps: the form instructs that if you did receive UD-101, you must address whether the verification statements are false and identify which UD-101 paragraphs are denied. Carefully choose only what is true: check non-receipt only if you truly did not get UD-101, otherwise complete the applicable denial sections with paragraph references. Instafill.ai can guide the conditional logic so the UD-101 section is completed consistently.
Forgetting to complete the Unlawful Detainer Assistant section (Item 7) in all cases
Item 7 must be completed in all cases, but many people leave it blank because they assume it applies only if they used an assistant. An unanswered Item 7 can lead to a rejected filing or a request to correct and refile, costing time in a fast-moving unlawful detainer timeline. Always check either “did not” or “did,” and if “did,” fill in the assistant’s registration details completely. Instafill.ai can ensure this mandatory section is never left unanswered and can format the assistant information consistently if applicable.
Missing or improper verification (wrong signer, missing signature, or incomplete perjury declaration)
People often sign the answer but forget the verification signatures/dates, or an attorney signs the defendant verification even though the form says to use a different verification if verified by an attorney or for an entity. An unverified or improperly verified answer can be treated as defective and may require correction, risking delays or procedural disadvantages. Ensure each defendant who is verifying signs and dates the verification section, and use the correct verification form if an attorney or a corporation/partnership is verifying. Instafill.ai can flag missing verification signatures/dates and help ensure the correct verification approach is used for the filer type.

Frequently Asked Questions About UD-105

 

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This plan is for your UD-105: 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 UD-105?
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 UD-105, 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 UD-105 to fill out?
UD-105 has a Form Complexity Index of 64 out of 100, in the complex tier: 211 fillable fields across 5 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 UD-105 (Answer—Unlawful Detainer) used for?
UD-105 is the defendant’s written response to an unlawful detainer (eviction) complaint in California. It tells the court whether you deny the allegations and what defenses or objections you are raising.
Who needs to fill out and file UD-105?
Any defendant named in the unlawful detainer complaint who wants to respond should file an Answer using UD-105 (unless using another permitted response). Every defendant for whom the Answer is filed must be listed in item 1 and must sign (unless an attorney signs for them).
How do I choose between “General Denial” and “Specific Denials” in item 2?
Check only one box. Use General Denial only if the complaint does not demand more than $1,000; if it demands more than $1,000, you generally must use Specific Denials and complete the required subparts identifying what you dispute.
Where do I find the case number and party names to put at the top of the form?
Copy the case number, plaintiff name, and defendant name exactly as they appear on the Summons/Complaint you were served. Include any letters, dashes, spaces, and leading zeros in the case number.
What if I need more space to explain my denials or defenses?
Use form MC-025 (Attachment) and title it exactly as the UD-105 indicates (for example, “Attachment 2b(1)(a)” or “Attachment 3w”). Then check the corresponding box on UD-105 that says the explanation is on MC-025.
How do I fill out the “Specific Denials” section (item 2b(1) and 2b(2))?
List the paragraph numbers from the complaint (and from UD-101, if applicable) that you claim are false or that you cannot confirm are true. If you did not receive the plaintiff’s UD-101, you can check the box stating you did not receive it; otherwise, complete the parts that apply and explain your denials.
Do I have to provide facts for every defense I check in item 3?
Yes. The form instructs that for each defense/objection box you check, you must briefly state supporting facts in item 3w (page 4) or on MC-025 if you need more room.
Which defenses on UD-105 apply only to nonpayment-of-rent cases?
Defenses 3a, 3b, and 3c are labeled “(Nonpayment of rent only)” and should be used only when the eviction is based on alleged nonpayment. Other defenses may apply to different types of eviction cases depending on your situation.
What documents might I need to support certain defenses on this form?
Some defenses require specific proof—for example, the domestic violence/abuse-related defense (item 3j) requires a qualifying restraining/protective order or police report (not more than 180 days old) or a signed statement from a qualified third party. For other defenses, you may want documents like notices, rent receipts, repair requests, photos, or communications, depending on what you claim.
What is item 4 (“Other Statements”) used for, like “Defendant vacated” or “fair rental value is excessive”?
Item 4 lets you add key facts the court should know, such as whether you already moved out and the date, or whether you believe the claimed fair rental value is excessive. If you need more space, you can explain on MC-025 and reference it as the form instructs.
What can I ask the court for in item 5 (“Defendant Requests”)?
You can request that the plaintiff take nothing, and you may request costs and (if applicable) attorney fees. If habitability is an issue in a nonpayment case, you can also request repairs and a rent reduction until conditions are corrected, and you can list other requests in item 5e (or on MC-025).
Do I have to complete the “Unlawful Detainer Assistant” section (item 7)?
Yes—item 7 says it must be completed in all cases. If you paid an unlawful detainer assistant for help, you must check “did” and provide the assistant’s registration details; otherwise check “did not.”
Do I need to sign and verify UD-105?
Yes. Each defendant for whom the Answer is filed must sign (unless an attorney signs), and the Verification section must be signed by the defendant(s) declaring under penalty of perjury that the Answer is true and correct.
Can AI tools help me fill out UD-105 accurately?
Yes—AI form-filling services like Instafill.ai can help auto-fill form fields from your information and documents, reducing manual typing and missed fields. You should still review everything carefully before signing because you are responsible for what is filed with the court.
How can I fill out UD-105 online using Instafill.ai, and what if my PDF isn’t fillable?
You can upload the UD-105 PDF to Instafill.ai, provide your case details (and any supporting documents), and let the AI map your information into the correct fields for review and download. If your copy is a flat/non-fillable PDF, Instafill.ai can convert it into an interactive fillable form so you can complete it and export a clean, typed version.
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California judicial forms: Judicial Council of California Form FL-300, Request for Order, Judicial Council of California Form FL-150, Income and Expense Declaration, Judicial Council of California Form SC-104, Proof of Service (Small Claims), Judicial Council of California Form SC-105, Request for Court Order and Answer (Small Claims), Judicial Council of California Form DE-111, Petition for Probate (Probate—Decedents Estates), 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), Judicial Council of California Form SC-120, Defendant’s Claim and ORDER to Go to Small Claims Court (Small Claims), Civil Case Cover Sheet (Judicial Council of California Form CM-010), Civil Case Cover Sheet (Judicial Council of California Form CM-010), Judicial Council of California Form TR-205, Request for Trial by Written Declaration (Trial by Written Declaration—Traffic), Judicial Council of California Form DE-120, Notice of Hearing—Decedent's Estate or Trust, Inventory and Appraisal Attachment (Judicial Council of California Form DE-161, GC-041), CLETS-001, Confidential Information for Law Enforcement (Judicial Council of California), Judicial Council of California Form SER-001, Request for Sheriff to Serve Court Papers, CLETS-001, Confidential Information for Law Enforcement (Judicial Council of California), Judicial Council of California Form ADOPT-210, Adoption Agreement, Judicial Council of California Form DE-120, Notice of Hearing—Decedent's Estate or Trust, Inventory and Appraisal (Judicial Council of California) (Form DE-160/GC-040), Judicial Council of California Form JUD-100, Judgment

unlawful detainer forms: Judicial Council of California Form UD-150, Request/Counter-Request to Set Case for Trial—Unlawful Detainer, Form UD-100, Complaint—Unlawful Detainer, Judicial Council of California Form UD-105, Answer—Unlawful Detainer, Judicial Council of California Form UD-150, Request/Counter-Request to Set Case for Trial—Unlawful Detainer, Judicial Council of California Form UD-100, Complaint—Unlawful Detainer, Form UD-105, Answer—Unlawful Detainer, Form UD-101, Plaintiff's Mandatory Cover Sheet and Supplemental Allegations—Unlawful Detainer, Form SUM-130, Summons - Unlawful Detainer - Eviction, Form DISC-003/UD-106, Form Interrogatories—Unlawful Detainer, Form UD-110, Judgment—Unlawful Detainer, Judicial Council of California, Form UD-110P, Judgment—Unlawful Detainer Partial Eviction Attachment, Form UD-115, Stipulation for Entry of Judgment (Unlawful Detainer), Form UD-116, Declaration for Default Judgment by Court (Unlawful Detainer—Civ. Proc., § 585(d)), Form UD-120, Verification by Landlord Regarding Rental Assistance—Unlawful Detainer, UD-155, Eviction Case (Unlawful Detainer) Stipulation, Judicial Council of California Form UD-110H, Judgment—Unlawful Detainer Habitable Premises Attachment

ETA forms: ETA Form 9061, Work Opportunity Tax Credit Individual Characteristics Form (ICF), Form UD-100, Complaint—Unlawful Detainer, 2420 - Served by Publication/Posting Forcible Detainer - Notice by Posting (CCM 0086), Oregon Practitioner Credentialing Application (including Attachment A: Professional Liability Action Detail), Murrieta Police Department Citizen Complaint Form (California Penal Code § 148.6 Advisory Statement), Judicial Council of California Form UD-150, Request/Counter-Request to Set Case for Trial—Unlawful Detainer, Judicial Council of California Form UD-105, Answer—Unlawful Detainer, Louisiana Secretary of State – Notice of Change of Registered Office and/or Change of Registered Agent (Domestic Limited Liability Company) (R.S. 12:1308) (Form SS983, Rev. 01/24), Judicial Council of California Form UD-150, Request/Counter-Request to Set Case for Trial—Unlawful Detainer, TIAA-CREF Funds IRA 60-Day Rollover Request (Retail Class Only), TIAA-CREF Funds IRA Distribution Form (Retail Class Only), TIAA-CREF Funds Beneficiary Designation Form (Retail Class Only), Vanguard Personal Investor – Unregulated Trust details – Account information update, Application Form: Individual Investor | Monthly Liquidity – Retail Hedge Fund, Application Form: Legal Entities | Retail Hedge Fund - Fundrock, Application Form: Individual Investor | Retail Hedge Fund, Fundrock Application Form: Legal Entities | Monthly Liquidity – Retail Hedge Fund, Form C8, Confidential contact details, Judicial Council of California Form UD-100, Complaint—Unlawful Detainer, GEN 1327, Policy Interpretation Request

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