How to get proof of dormant company filing

By DormantFile · Updated 27 May 2026

Once you have filed your dormant accounts or CT600, you will want proof that the filings were accepted. This matters for your own records, for co-directors who want confirmation, and in case HMRC or Companies House ever query your filing history.

Companies House confirmation

After Companies House accepts your annual dormant accounts, the filing appears on your company's public record. You can verify this by searching for your company on the Companies House website and looking at the Filing history tab.

The key thing to look for is the "made up to" date — this is the date the accounts were prepared to (i.e. the end of the accounting period). If the accounts show the correct "made up to" date and the status is not rejected, your filing was accepted.

Companies House does not issue a receipt in the traditional sense. The public filing record is the confirmation.

HMRC confirmation

When HMRC accepts a CT600 submission, they return a confirmation response that includes a unique correlation ID. This is your proof that the return was received and accepted for the accounting period in question.

Unlike Companies House, CT600 filings are not publicly visible. If HMRC later queries whether you filed, the correlation ID from the acceptance response is your evidence. This becomes especially important if you receive an HMRC letter about your dormant company — having the receipt to hand turns a stressful exchange into a one-reply matter.

What is in a filing receipt

A filing receipt typically contains:

Company name and CRN — which company the filing relates to
Filing type — dormant accounts or CT600
Accounting period — the start and end dates of the period covered
Submission reference — a unique identifier for the submission
IRmark — a digital fingerprint of the document content, used by both HMRC and Companies House to verify integrity
Acceptance date and time — when the filing was confirmed as accepted

This information is what you would provide if you ever needed to demonstrate that a filing was made.

DormantFile receipts

Every filing submitted through DormantFile generates a receipt once it is accepted. You can find these on the filing detail page in your dashboard.

Each receipt can be:

Printed directly from the browser for paper records
Copied to clipboard as formatted text for pasting into emails, spreadsheets, or notes

Receipts are stored against the filing record permanently, so you can come back and retrieve them at any time. If you manage multiple companies, each company's filings have their own receipts.

Why keep filing receipts

Most of the time, nobody will ask for them. But there are situations where having a receipt matters:

Director queries — a co-director or shareholder wants confirmation that filings are up to date
HMRC correspondence — HMRC sends a letter claiming a CT600 was not filed, and you need to respond with evidence
Professional advisers — an accountant, solicitor, or mortgage broker asks for proof the company is compliant
Selling or transferring the company — a buyer wants to verify the filing history before completing the purchase
Reactivating the company — when reactivating a dormant company, HMRC will check your prior filing history before reopening Corporation Tax

Filing a return and being able to prove you filed it are two different things. A receipt takes seconds to save and could save you hours of correspondence later.

Key points

Companies House filings are confirmed by the "made up to" date appearing in the public filing history.
HMRC CT600 acceptance includes a correlation ID as proof of submission.
Filing receipts contain the company details, period, submission reference, and IRmark.
DormantFile provides printable receipts with a copy-to-clipboard option for every accepted filing.
Keep receipts for director queries, HMRC correspondence, and professional advisers.