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Yes! You can use AI to fill out Declaration in Support of Changing Primary Custody within One Year

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Declaration in Support of Changing Primary Custody within One Year, page 1
Basic · 37/100Form Complexity Index

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What this form asks for

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

This form is a legal declaration required in Texas for a parent seeking to change the primary custody of a child within one year of the existing court order. It requires the filer to state, under penalty of perjury, the specific reasons why a change is necessary, such as the child's environment being harmful or other statutory grounds being met. 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 fields36
Pages4
Form Complexity IndexBasic, 37/100

The AI checks your answers before you download

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

At Least One Minor Child's Name Required

This validation ensures that the name of at least one minor child has been entered at the top of the form. The entire declaration is filed 'In the Interest of' the children, making their identification a fundamental requirement for the document's validity. If no child's name is provided, the form submission should be blocked as it lacks a subject.

Declarant Age Verification (18+)

This check calculates the declarant's age using the 'My date of birth is' field to confirm they are 18 years of age or older. Section 2 of the form requires the declarant to affirm they are of age and competent, and this validation programmatically enforces that legal requirement. If the calculated age is under 18, the submission should be prevented with an error message explaining the age requirement.

Mandatory Selection of Requested Change

This validation verifies that the user has selected at least one of the checkboxes in Section 3, which specifies the change being requested from the court. The purpose of the form is to petition for a change, so failing to specify the desired change makes the filing incomplete and without purpose. The user must be prompted to select an option before they can proceed.

Mandatory Selection of Legal Basis

This check ensures that at least one of the legal reasons listed in Section 5b has been selected. These reasons are required under Texas Family Code 156.102 to justify filing a custody change request within one year of the current order. A submission without this selection is legally insufficient and would be rejected by the court, so the form should not be submittable without it.

Factual Support Narrative Completeness

This validation confirms that the large text field in Section 6, which requires a statement of specific supporting facts, is not empty. The form explicitly warns that the court will deny the request without adequate facts. This check prevents the submission of a legally weak or incomplete declaration that would waste the court's and the petitioner's time.

Exclusive Signature Block Completion

This check ensures that the user has completed the fields for EITHER the unsworn declaration (for users without a notary) OR the notarized affidavit, but not both. This prevents ambiguity in how the document was executed. An error should be triggered if neither section is completed or if both are filled out, guiding the user to complete only one.

And 7 more checks
  • Unsworn Declaration Data Consistency
  • Cause Number Presence and Format
  • Valid Date of Birth Format
  • Standard Email Address Format
  • Exclusive Court Type Selection
  • Notarized Affiant Name Consistency
  • Valid and Current Signature Date

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How to Fill Out FM-Mod1-112 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the 'Declaration in Support of Changing Primary Custody within One Year' form.
  2. Enter the court and case information, including the cause number and the county in Texas.
  3. Provide the full names of the minor children involved in the custody case.
  4. Fill in your personal information, including your full name, date of birth, and current address.
  5. Carefully check the boxes that correspond to the legal reasons you are filing the modification, as outlined in Texas Family Code 156.102.
  6. In the designated section, write a detailed, factual statement explaining the circumstances that support your request for a custody change.
  7. Review the entire document for accuracy, then sign the declaration either as an unsworn declaration or in front of a notary public, as instructed on the form.

Common Mistakes in Completing FM-Mod1-112

The ones the AI is built to catch.

Signing in the Wrong Section or at the Wrong Time
The form has two distinct signature blocks: one for an unsworn declaration and one for a notarized affidavit. Filers frequently get confused and sign in both places, sign the notary section without a notary present, or choose the wrong option. Signing improperly can invalidate the entire document, leading to its rejection by the court clerk. Carefully read the instructions for each section and sign ONLY ONE—either the unsworn declaration section on your own or the affidavit section in the physical presence of a notary public.
Providing a Weak or Legally Insufficient Factual Basis
In Section 6, filers must provide specific, factual reasons for the custody change. A common error is to write emotional pleas or vague statements like 'it's in the child's best interest' instead of concrete examples of endangerment or changed circumstances. The court will deny the request and refuse to schedule a hearing if the facts are not adequate, wasting the filer's time and money. To prevent this, list specific dates, events, actions, and observations that directly support the legal grounds checked in Section 5.
Incorrectly Identifying the Case and Court
People often misremember or improperly transcribe the Cause Number, Court Number, or County from the original order. This happens due to rushing or not having the correct documents on hand for reference. An incorrect Cause Number can lead to the declaration being filed in the wrong case file or rejected outright, causing significant delays and requiring refiling. To avoid this, carefully copy the information directly from the most recent court order in your case.
Misunderstanding the Legal Grounds in Section 5
Section 5 requires the filer to attest to specific legal conditions that permit a custody change within one year. People may check boxes that don't apply to their situation out of desperation or a misunderstanding of legal terms like 'endangerment' or 'voluntarily given up primary care.' Selecting incorrect grounds can undermine the filer's credibility and lead to immediate dismissal of their request. It is crucial to understand the legal standard for each option before checking the box.
Failing to Select the Declaration Type
Near the top of the first page, the filer must check a box to indicate whether they are signing in front of a notary (affidavit) or under penalty of perjury (unsworn declaration). Many people overlook this small but critical step. Forgetting to check this box can lead to the document being considered incomplete and rejected by the clerk, forcing a refiling.
Submitting an Illegible Document
This form is often printed and filled out by hand, which can result in illegible handwriting. If the clerk, judge, or opposing party cannot read the names, dates, or crucial facts in Section 6, the filing may be rejected or its contents disregarded. This forces the filer to redo the paperwork, causing delays. To avoid this, print clearly in block letters or use a tool like Instafill.ai, which can convert a non-fillable PDF into a fillable version, allowing you to type your answers for maximum clarity.
Listing Incomplete or Incorrect Child Names
The form requires the full legal name of each child involved in the custody case. Filers sometimes use nicknames, omit middle names, or misspell names, which can create legal ambiguity. This can lead to confusion and require clarification or amendments later, delaying the legal process. Always use the child's full legal name as it appears on their birth certificate or the existing court order.
Providing Inconsistent Personal Information
The form asks for the filer's name and address in two different places if they choose the unsworn declaration option (Section 1 and the signature block on page 4). A common mistake is to have slight variations between these entries, such as using a middle initial in one place and the full middle name in another. Any inconsistency can raise questions about the document's authenticity and may cause processing delays. AI-powered form filling tools like Instafill.ai can help prevent this by auto-populating recurring information consistently across the document.
Omitting the Cause Number
The Cause Number is the unique identifier for the entire legal case. Filers sometimes leave this field blank, especially if they are filling out the form away from their other case documents. Without the Cause Number, the clerk's office cannot link the declaration to the correct case file, and the document will be rejected. Always have your existing court orders handy to ensure this number is filled in correctly.
Forgetting to Fill in the County
The form requires the county to be specified in multiple locations, including the court information at the top and the signature blocks at the end. People often forget to fill in the county where the case is filed or the county where they are signing the document. This omission makes the document legally incomplete and can lead to its rejection by the court clerk.

Frequently Asked Questions About FM-Mod1-112

 

Is it really free for 7 days?
Yes. You pay $0 today. Cancel before Nov 7 and you are never charged. Keep it, and it is $19.99 a month for 5 fills of your FM-Mod1-112.
Can I fill other forms too?
This plan is for your FM-Mod1-112: 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 FM-Mod1-112?
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 FM-Mod1-112, 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 FM-Mod1-112 to fill out?
FM-Mod1-112 has a Form Complexity Index of 37 out of 100, in the basic tier: 36 fillable fields across 4 pages. 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 'Declaration in Support of Changing Primary Custody within One Year' form?
This form is used to ask a Texas court for permission to proceed with a custody modification case less than one year after the current custody order was issued. It explains to the judge why an early change is necessary and justified under the law.
Who needs to fill out this form?
The person (the Petitioner) who is requesting to change the primary custody of a child, remove a geographic restriction, or change a geographic restriction within one year of the existing court order must complete this form.
What are the legal reasons I can use to file for a custody change within a year?
According to the form, you must believe the change is in the child's best interest and that the other parent agrees, the other parent voluntarily gave up care for at least 6 months, or the child's current environment may cause physical or emotional harm.
What information do I need to write in Section 6, 'I know this is true because'?
You must state specific facts and details that support the reasons you checked in Section 5. The court will use this information to decide if your case can proceed, so be as clear and detailed as possible.
What happens if I don't provide enough detail in Section 6?
The form explicitly warns that the court will deny your request to change custody and will not schedule a hearing if the facts you state are not adequate to support your claims.
What is a 'Cause Number' and where do I find it?
The Cause Number is the unique case number the court assigned to your original custody case. You can find it on all previous court documents related to your child(ren).
Do I have to sign this form in front of a notary?
The form provides two options: you can sign in front of a notary, or you can sign the 'unsworn declaration' under penalty of perjury without a notary. Both are legally acceptable methods to verify your statements.
Is this form all I need to file to change custody?
No, this declaration is a supporting document that must be filed with your main Petition to Modify the Parent-Child Relationship. It is specifically required only when filing within one year of the last order.
What does it mean to have the 'right to designate the primary residence'?
This is the legal right given to one parent to determine where the child lives, which may be subject to a geographic restriction.
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 with your personal information, which can save time and reduce errors.
How can I fill out this form online?
You can use a service like Instafill.ai to fill out the form online. Simply upload the PDF, and the platform will make it an interactive, fillable form that you can complete from your computer.
The PDF version of this form I have is not fillable. What should I do?
If you have a non-fillable or 'flat' PDF, you can upload it to a service like Instafill.ai. Their technology can convert it into an interactive, fillable form for you to complete online.
What kind of documents should I have ready when filling this out?
You should have your current custody order to reference the court information and Cause Number. You should also gather any documents that support the facts you will state in Section 6, such as emails, texts, or records.
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