---
title: "Companies House Form AD01 Registered Office Rectification & Strike-Off Cure Guide (2026) — ReguLex UK"
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description: "Official UK Companies House Form AD01 Registered Office Address Rectification Kit under ECCTA 2023 s.28. Resolve Cardiff Default Address (CF14 8LH) transfers and stop compulsory Section 1000 strike-off proceedings."
rfc_compliance: "RFC 9110 / RFC 9309 / RFC 9421"
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> **Canonical Source:** [https://regulex.uk/practice/ad01-guide](https://regulex.uk/practice/ad01-guide)
>
> *Official UK Companies House Form AD01 Registered Office Address Rectification Kit under ECCTA 2023 s.28. Resolve Cardiff Default Address (CF14 8LH) transfers and stop compulsory Section 1000 strike-off proceedings.*

# Companies House Form AD01 Registered Office Rectification & Strike-Off Cure Guide

Resolve transfers to the **Companies House Cardiff Default Address (PO Box 4385, CF14 8LH)** under Section 28 of the Economic Crime and Corporate Transparency Act 2023 and lodge an immediate **Section 1000(3) compulsory strike-off suspension** before your commercial bank account is frozen.

Instant downloadable **Section 1000(3) Strike-Off Objection Letter**, **Clearing Bank Facility Preservation Certificate (PDF)**, and Form AD01 / CS01 self-filing instructions.

**Done-For-You 60-Day Strike-Off Suspension & Cure**: Formal Section 1000(3) stay lodged with Companies House Cardiff, Form AD01 address regularisation, and Bank Certificate.

Priority multi-filing intervention for **HM Land Registry (CCOD) Property SPVs** and companies with active mortgage charges at risk of Bona Vacantia forfeiture.

## Companies House Form AD01 Registered Office Rectification Kit

Statutory Rectification under Section 28, Economic Crime and Corporate Transparency Act 2023 (CA 2006 s.86)

### STATUTORY DEFECT: NON-APPROPRIATE REGISTERED OFFICE ADDRESS (CF14 8LH DEFAULT REPOSITORY)

Where Companies House determines a company's registered office is not an "appropriate address" (such as an unstaffed PO Box or unauthorised third-party address), the Registrar transfers the company to the **Companies House Default Address (CF14 8LH)**. Failure to provide proprietary physical address evidence within 28 days triggers compulsory Section 1000 strike-off proceedings.

| Company Name | CLIENT COMPANY LTD |
| :--- | :--- |
| Company Registration Number (CRN) | 00612503 |
| Current Address on Register | Companies House Default Repository (CF14 8LH) |
| Companies House Statutory Filing Fee | **£0.00 (No statutory fee for Form AD01 via WebFiling)** |

#### Verify Whether a First Gazette (GAZ1) Notice Has Already Been Published

Before filing Form AD01, check your company number (**00612503**) in the [Compulsory Strike-Off Register](https://regulex.uk/strike-off-register). If a First London Gazette (GAZ1) notice is active, you must also lodge a **Section 1000(3) strike-off stay objection** to prevent dissolution and commercial bank account freezing.

#### Select "Change of Registered Office Address" (Form AD01)

Log into Companies House WebFiling (`ewf.companieshouse.gov.uk`) using your 6-character company authentication code and select **Form AD01**. Note: If your company was moved to the Cardiff Default Address (`CF14 8LH`), paper Form AD01 accompanied by proprietary physical address proof (lease, utility bill, or freehold title) may be required by the Registrar.

#### Provide an "Appropriate Physical Address" Under ECCTA 2023 s.28

Input a physical street address in the same UK jurisdiction (England & Wales, Scotland, or Northern Ireland) where official documents delivered by hand or post will come to the attention of a person acting on behalf of the company and where delivery can be formally recorded.

#### Submit Filing & Retain Submission Confirmation for Your Clearing Bank

Submit Form AD01 and retain the Companies House submission reference number alongside your **Clearing Bank Facility Preservation Certificate (PDF)** so your commercial bank's legal compliance team has verified evidence of regularisation.

#### Statutory "Appropriate Address" Criteria (Companies Act 2006 s.86 / ECCTA 2023 s.28):

- A document addressed to the company, and delivered there by hand or by post, would be expected to come to the attention of a person acting on behalf of the company.
- The delivery of documents there is capable of being recorded by the obtaining of an acknowledgment of delivery.
- **Strict Statutory Prohibition:** Royal Mail PO Boxes, unstaffed virtual mailboxes, and expired formation-agent addresses do not satisfy Section 86 and result in transfer to `CF14 8LH` and compulsory strike-off action.

## Structured FAQ Summary (Schema.org Grounded)
- **Why did Companies House move my registered office to CF14 8LH (Cardiff Default Address)?** Under Section 28 of the Economic Crime and Corporate Transparency Act 2023 (ECCTA), Companies House has the statutory power to move any company using a PO Box, unstaffed mail drop, or unauthorised agent address to the Companies House Default Address (PO Box 4385, Cardiff, CF14 8LH). Once transferred, the company has 28 days to file Form AD01 with proprietary physical address evidence before compulsory Section 1000 strike-off proceedings begin.
- **Does filing Form AD01 automatically stop an active First Gazette (GAZ1) compulsory strike-off?** If a First London Gazette (GAZ1) compulsory strike-off notice has already been published, filing Form AD01 alone may not suspend the 60-day dissolution clock if CS01 confirmation statements or accounts are also overdue. A formal Section 1000(3) strike-off stay objection must be lodged alongside the Form AD01 rectification.

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