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Yes! You can use AI to fill out Form RX1: Application to enter a restriction

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Form RX1: Application to enter a restriction, page 1
Basic · 40/100Form Complexity Index

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What this form asks for

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

Form RX1 is a legal document used to apply to HM Land Registry in the UK to enter a restriction on a property's title register. It is most commonly used to register a standard 'Form A' restriction, which reflects that the property owners hold the property as 'tenants in common' rather than 'joint tenants'. This is crucial as it prevents a sole surviving proprietor from selling or mortgaging the property on their own, protecting the deceased owner's share. 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 fields35
Pages3
Sections10
Questions that depend on earlier answers1
Form Complexity IndexBasic, 40/100

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 Title Number is Provided

This check verifies that Panel 2, 'Title number(s) of the property', is not empty. The title number is the primary identifier for the property in the Land Registry system, and the form explicitly states the application cannot be accepted without it. Failure to provide a title number will result in immediate rejection of the application.

Validates Title Number Format

This check ensures that the value entered in Panel 2 follows the standard format for a Land Registry title number (e.g., a combination of letters and numbers like 'AB123456'). An incorrectly formatted title number will prevent the system from locating the property register. This failure would lead to a requisition for correction or potential rejection.

Ensures Property Description is Complete

This validation confirms that Panel 3, 'Property', contains either a full postal address or another clear description of the property. This information is crucial for cross-referencing and ensuring the correct property is being dealt with, especially if there are issues with the title number. An incomplete or missing description will result in a requisition for more information.

Verifies Applicant Name is Provided

This check ensures that the applicant's full name is entered in Panel 5. The form specifies that this must be the client's name, not the conveyancer's. This is legally necessary to identify the party making the application, and failure to provide it will halt the process until the information is supplied via a requisition.

Confirms Submitter Details are Present

This check validates that the 'Name' and 'Address' fields in Panel 6 are completed, as the form states 'This panel must always be completed'. These details are essential for all correspondence, including requests for information (requisitions) and confirmation of completion. Missing contact information would prevent the Land Registry from communicating with the sender, causing significant delays or rejection.

Validates Email Address Format

This check verifies that if an email address is entered in Panel 6, it conforms to a standard email format (e.g., '[email protected]'). The form indicates that email will be the preferred method of communication for requisitions and cancellation warnings. An invalid email address would lead to failed communication, delaying the application process.

And 6 more checks
  • Enforces Single Selection in Evidence Panel
  • Verifies Signature is Present
  • Validates Signature Date
  • Confirms Zero Fee for Form A Restriction
  • Checks for Key Number with Direct Debit Payment
  • Validates Conveyancer Certification Logic

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How to Fill Out RX1 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select Form RX1 from the form library.
  2. Use the AI assistant to accurately fill in property details in Panels 1-3, including the local authority and title number(s).
  3. Enter the full name of the applicant(s) in Panel 5 and the contact details for the person submitting the application in Panel 6.
  4. In Panel 7, select the correct option that corresponds to your evidence of severance, such as an application by all proprietors or a notice of severance.
  5. Review the standard wording of the Form A restriction in Panel 8 to ensure it is correct for your application.
  6. Digitally sign and date the form in Panel 9. If a conveyancer is acting, they must sign.
  7. Download the completed form, gather any required supporting documents, and submit it to HM Land Registry.

Common Mistakes in Completing RX1

The ones the AI is built to catch.

Missing or Incorrect Title Number in Panel 2
Applicants frequently omit the property's title number or enter it incorrectly. The form explicitly states that the application cannot be accepted without this crucial identifier. This mistake leads to an immediate rejection of the application, causing significant delays. Always double-check the title number against official property documents before submission to ensure it is complete and accurate.
Entering Conveyancer's Name as the Applicant in Panel 5
A common error occurs when a conveyancer lodging the application enters their own firm's name in Panel 5 instead of the client's. The instructions clearly state this panel is for the person(s) applying for the restriction, i.e., the property owners. This error will result in the Land Registry raising a requisition for clarification, delaying the process. The applicant is always the client, not the legal representative submitting the form.
Incorrect Evidence of Severance Selection in Panel 7
Panel 7 is complex and a frequent source of errors, such as selecting the wrong option for the circumstances or ticking multiple boxes. For example, an applicant might select option (A) when they are the sole applicant, not applying with all other proprietors. This leads to rejection as the evidence provided does not match the application basis. Carefully read each option to ensure it precisely matches your situation and enclose the correct supporting documents if you are not a conveyancer.
Missing or Incorrect Signatures in Panel 9
Applications are often returned because Panel 9 is unsigned, undated, or signed by the wrong person. If a conveyancer is acting, they must sign; if not, the applicant(s) must sign. If applying under Panel 7(A), all joint proprietors must sign. A missing signature invalidates the application, requiring it to be returned for completion and causing delays.
Incomplete Contact Information in Panel 6
Applicants often fail to provide a complete address or, more critically, an email address in Panel 6. The Land Registry uses this email for all requisitions and warnings of cancellation, making it the fastest way to resolve issues. Omitting an email address means all correspondence will be sent by post, significantly slowing down the resolution of any problems with the application. For conveyancers, an email is required to receive cancellation warnings.
Failing to Enclose Required Evidence (for Non-Conveyancers)
When an applicant is not represented by a conveyancer and selects an option in Panel 7(B) or 7(C), they often forget to enclose the required physical evidence, such as a certified copy of the severance document or notice. The application cannot be processed without this proof and will be rejected. Always ensure that any documents you certify you are enclosing are actually included with the application form.
Submitting Original Documents Instead of Certified Copies
Many people believe sending original documents is safer, but the form explicitly warns that documents will be destroyed after scanning. Sending valuable original deeds or notices of severance risks their permanent loss. Always send certified copies as instructed to protect your original documents from being destroyed by the Land Registry.
Using Incorrect Ink or Not Using Block Capitals
The instructions require any handwritten parts of the form to be completed in black ink and in block capitals for clarity and scanning purposes. Applicants sometimes use blue ink or cursive handwriting, which can lead to data entry errors or the form being returned for correction. Following these simple formatting rules prevents unnecessary processing delays. AI-powered tools like Instafill.ai can convert flat PDFs into fillable versions, eliminating handwriting errors entirely.
Confusing the Applicant (Panel 5) with the Sender (Panel 6)
An unrepresented applicant might mistakenly put their own details in both Panel 5 and Panel 6, or mix them up. Panel 5 is exclusively for the full name(s) of the property owner(s) applying for the restriction. Panel 6 is for the contact details of the person or firm physically sending the form to the Land Registry. This confusion can cause delays while the Land Registry seeks clarification on who the actual applicant is.
Incorrect Local Authority Name in Panel 1
Applicants may enter the wrong local authority, especially in areas served by multiple tiers of local government (e.g., county and district councils). The form specifies using the authority to which council tax or business rates are paid. Entering the wrong one can cause confusion or require clarification. Using an AI form-filler like Instafill.ai can help prevent this by automatically populating the correct local authority based on the property address.

Frequently Asked Questions About RX1

 

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 RX1.
Can I fill other forms too?
This plan is for your RX1: 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 RX1?
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 RX1, 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 RX1 to fill out?
RX1 has a Form Complexity Index of 40 out of 100, in the basic tier: 35 fillable fields across 3 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 apply to HM Land Registry to enter a 'Form A restriction' on a property's title register. This is typically done after a joint tenancy has been severed, changing the ownership structure to 'tenants in common'.
What is a 'Form A restriction'?
A Form A restriction, as stated in Panel 8, prevents a sole surviving owner from selling or mortgaging the property on their own. It ensures that the share of a deceased owner passes to their estate rather than automatically to the surviving co-owners.
Who needs to fill out this application?
The application should be completed by the registered proprietors (owners) of the property. A conveyancer can complete and submit the form on the owners' behalf.
Is there a fee to apply for a Form A restriction?
No, Panel 4 of the form states that there is currently no fee payable to HM Land Registry for the entry of a Form A restriction.
What information is essential to include on the form?
You must include the property's title number(s) in Panel 2, the property address, the applicants' full names, and details of the person submitting the form. Failure to provide the title number will result in the application being rejected.
How do I complete Panel 7 regarding evidence of severance?
You must select only one option in Panel 7. If all registered owners are applying together, choose option (A). If not, you must choose an option under (B) or (C) and provide the required evidence, such as a severance document or a served notice of severance.
What documents do I need to send with the form?
This depends on the option selected in Panel 7. If not all owners are applying, you may need to enclose the original or a certified copy of the severance document or the notice of severance. If a conveyancer is acting, they may be able to certify they hold the necessary documents instead.
What happens to the original documents I send to HM Land Registry?
HM Land Registry will scan any documents you send with your application. After scanning, the original and certified copy documents will be destroyed, so it is advisable to keep your own copies.
Who should sign the form in Panel 9?
If a conveyancer is submitting the application on your behalf, they must sign it. If you are applying without a conveyancer, each applicant (owner) must sign the form themselves.
Can I submit this form without using a solicitor or conveyancer?
Yes, you can submit the form yourself. If you do, you must sign Panel 9 and ensure you enclose the required original or certified copy evidence documents as specified in Panel 7.
Where do I enter my contact information?
Enter the name and address of the person or firm sending the application in Panel 6. Providing an email address is recommended as HM Land Registry will use it for correspondence whenever possible.
Can AI tools 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 the risk of errors. This is particularly helpful for ensuring consistency across multiple documents.
How can I use Instafill.ai to complete this form online?
Simply upload the form to the Instafill.ai platform. Their AI will identify the fields, allowing you to provide your information once and have it automatically and accurately placed into the correct sections of the form.
The PDF version of this form I found is not fillable. What can I do?
You can use a service like Instafill.ai, which is designed to convert flat, non-fillable PDFs into interactive, fillable forms. This allows you to easily type your information directly into the fields on your computer before printing.
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