Terms and conditions

Last updated: 4 September 2026.

AAA WebFiling is operated by HAMILTONN LTD, company number 15023569, registered office at Flat 1 117 Station Road, Edgware, England, HA8 7JG. References to “AAA WebFiling”, “Hamiltonn”, “we”, “us” or “our” in these terms mean HAMILTONN LTD as operator of the service.

These terms apply together with our Terms of Use, Privacy Policy, applicable pricing or order information and any separately agreed written commercial terms. If separately agreed written terms expressly conflict with these terms, the separately agreed terms take priority to the extent of the conflict.

1. The service

AAA WebFiling is independent business software that can provide company portfolio management, deadline tracking, company information, supported Companies House filing workflows, client forms and authority records, billing and other enabled services. Where HMRC VAT functionality is enabled, the service can also provide authorised VAT information retrieval and filing workflows.

Not every feature described on the website is necessarily enabled for every account, plan, company, filing type or environment. Features may depend on external authority approval, credentials, account permissions, subscription entitlements or technical availability.

2. Eligibility and authority

You must be legally capable of entering into these terms and must only use the service for a company, person, client, VAT registration or filing where you have authority to act. Professional users, accountants, company secretaries, law firms and agents are responsible for obtaining and maintaining the authority required to act for their clients.

Creating an account, adding a company to a portfolio or obtaining public-register information does not by itself prove that you are authorised to make a filing or access non-public information for that company.

3. Accounts and security

You are responsible for maintaining accurate account information and for protecting access to your account, email account and any filing credentials. You must not share login codes, company authentication codes, Companies House personal codes, HMRC credentials, access tokens or other protected credentials with an unauthorised person.

We may require additional verification, restrict a feature or suspend access where reasonably necessary to protect the service, customers, public-authority integrations or data.

4. Company information and Companies House services

Some company information displayed by AAA WebFiling is obtained from Companies House and may reflect the data and timing of that external service. You must review information relevant to a filing rather than assume that cached or previously retrieved data remains current.

Before a Companies House filing is sent, you are responsible for checking the filing, the company, the authority to act, all names and dates, authentication or identity-verification information and any declaration required by law. Acceptance or rejection is determined by Companies House, not AAA WebFiling.

5. HMRC VAT authorisation

HMRC VAT functions are available only when enabled by AAA WebFiling and when the relevant user has successfully authorised the software with HMRC for the VAT registration number concerned. The HMRC authorisation determines the permissions granted to the software and may expire, be revoked or require re-authorisation.

A Companies House company number and an HMRC VAT registration number are separate identifiers. The service is designed to bind an HMRC VAT connection to the relevant company context to reduce the risk of using the wrong VAT registration for a filing. You remain responsible for checking that the company and VAT registration shown in the filing workflow are correct.

6. HMRC fraud-prevention data

HMRC requires specified fraud-prevention header information for the VAT Making Tax Digital API. When you use an enabled HMRC VAT function, the service may collect and send the technical browser, device, connection, user-authentication and vendor/server information described in our Privacy Policy. You must not attempt to falsify, suppress or circumvent information that HMRC requires the software to provide.

7. Preparing and submitting a VAT return

Preparing, saving or reviewing VAT figures is not the same as submitting a VAT return. A filing is intended to be sent only through the designated final submission step after the relevant period, figures, company, VAT registration and declaration have been reviewed.

You are responsible for the truth, completeness and accuracy of the VAT figures and for ensuring the return is legally due and appropriate to submit. AAA WebFiling may calculate or validate fields where HMRC rules permit, but those controls do not replace your responsibility for the underlying records or tax treatment.

Where HMRC returns an uncertain technical outcome, the service may reconcile the period or retrieve the return rather than automatically sending a second VAT return. You must not attempt to create a duplicate filing simply because a browser page times out or an immediate confirmation is unavailable.

8. Receipts, records and external acceptance

Where an external authority provides a receipt, correlation reference, transaction identifier or filing status, AAA WebFiling may store that information as evidence of the request and response. A local status or receipt does not override the authoritative record held by Companies House or HMRC.

9. Fees, plans and billing

Charges, included services, transaction fees and subscription entitlements are those shown on the applicable pricing, checkout, invoice or agreed commercial terms at the time of purchase. Unless expressly stated otherwise, taxes such as VAT may be added where applicable.

Where hosted payment checkout is used, payment processing may be provided by a third party such as Stripe. Failed, reversed, disputed or incomplete payments may result in the related paid feature or service remaining unavailable.

10. Customer data and data protection

You must only upload, enter or otherwise provide personal data where you have a lawful basis and appropriate authority to do so. If you use the service for your own clients, you are responsible for your own notices, instructions, professional obligations and controller responsibilities. Our handling of information is described in the Privacy Policy.

11. External services

The service relies on external systems including government APIs and, where enabled, payment, email, communications, signature and infrastructure services. Those systems can be unavailable, delayed, changed or subject to their own terms. We do not control whether Companies House, HMRC or another authority accepts a filing or how quickly an external service responds.

12. Availability, maintenance and changes

We aim to operate the service reliably but do not guarantee uninterrupted or error-free availability. We may deploy security changes, maintenance, compatibility updates or changes required by Companies House, HMRC or another integration without maintaining every previous behaviour indefinitely.

13. No legal, accounting or tax advice

AAA WebFiling is software, not a substitute for legal, accounting or tax advice. Information, reminders, calculations, validations and workflow prompts are operational aids. You should obtain professional advice where you are uncertain about legal duties, accounting treatment, tax treatment or the effect of a filing.

14. Intellectual property

The AAA WebFiling software, website design, original documentation, branding and other proprietary material belong to HAMILTONN LTD or its licensors. Public-register and government information remains subject to the rights, licences and terms that apply to those sources. These terms do not transfer ownership of the software to you.

15. Suspension and termination

We may restrict, suspend or terminate access where reasonably necessary because of non-payment, material breach, unlawful or unauthorised use, security risk, abuse of an external integration, regulatory requirement or a need to protect other users or the service. Where practicable and appropriate, we will provide notice or an opportunity to remedy the issue.

Termination does not automatically require immediate deletion of records that must reasonably be retained for filing evidence, accounting, security, disputes or legal obligations. Retention is governed by the Privacy Policy and applicable law.

16. Liability

Nothing in these terms excludes or limits liability that cannot lawfully be excluded or limited. Subject to that, each party remains responsible for loss caused by its own breach, negligence or unlawful act, and you remain responsible for the accuracy and authority of filings and instructions you submit through the service.

To the extent permitted by law, HAMILTONN LTD is not responsible for a loss caused solely by inaccurate information supplied by a user, an unauthorised instruction, an external authority's acceptance or rejection decision, or an outage or change in an external service outside our reasonable control. Any separate written commercial agreement may contain additional or different liability terms.

17. Consumer and mandatory rights

Nothing in these terms removes rights that applicable law says cannot be excluded or restricted. Where mandatory consumer protections apply to a particular customer, those protections continue to apply.

18. Governing law

Unless mandatory law or separately agreed written terms require otherwise, these terms and disputes relating to them are governed by the laws of England and Wales and are subject to the jurisdiction of the courts of England and Wales.

19. Changes and contact

We may update these terms to reflect changes to the service, law or external integrations. The date at the top identifies the current published version. Questions can be raised through our contact page.