· until the transition period ends on 18 November
Get every client verified before the deadline.
Muster reads the Companies House register for your whole client list, shows which directors and PSCs still have to verify, writes the chasing emails for you and tracks who has done it.
First 3 companies free · No account needed · From £49 a list
How it works
Check. Chase. Confirm.
One purchase covers the whole job, from finding who's outstanding to knowing they've done it.
01 · Check
Every director and PSC, most urgent first
Paste your client company numbers or drop in an export from your practice software. Muster reads each company's officers and people with significant control from the register and sorts everyone by deadline, so the overdue ones are at the top.
- Directors and individual PSCs in one view
- Due dates, days overdue and each company's next CS01 date
- Filter, search and download for Excel
02 · Chase
A ready to send email for every client
For each client with someone outstanding, Muster drafts a plain English email naming each person, their role and their due date, with the GOV.UK link and what to send back. If you're an authorised agent, it offers to verify them for you instead.
- One letter per company, people merged across director and PSC roles
- Your practice name and sign off, set once
- Copy each letter, or export them all for a mail merge
Urgent · Ashcombe Joinery Ltd
Identity verification needed for Ashcombe Joinery Ltd
Hello,
Companies House now requires every director and person with significant control to verify their identity…
• Daniel James Hart (director and person with significant control): was due by…
03 · Confirm
Run it again and see who's done it
Your report link works for 60 days. Each time you check again, Muster compares the register with your last run and shows who has verified, whose dates have moved and who has newly appeared, so you know exactly who to chase next.
- Unlimited re-checks of the same list for 60 days
- Changes since your last check, listed person by person
- Covers new PSCs and appointments after 18 November too
Run a check
Start with your client list.
Any format works. We pick out company numbers, add missing leading zeros and remove duplicates. Try the first three free before you pay.
- Time
- About 3 minutes per 100 companies
- Data
- Read live from the official Companies House API
- Privacy
- Your list stays in your browser and isn't stored
Secure card payment through Stripe. Receipt by email.
Report
Results
Pricing
One price per list. Everything included.
No subscription and no account. Every plan includes the report, client letters and 60 days of re-checks.
Sole practitioner
£49
Up to 100 companies
Practice
£149
Up to 500 companies
Firm
£299
Up to 2,000 companies
- Report of every director and PSC
- Client letters and mail merge export
- Re-checks with changes for 60 days
- CSV for Excel and a print version
More than 2,000 companies, or need to pay by invoice? Email hello@gptshopltd.com. Stripe adds any tax that applies at checkout.
Method and privacy
Built on the register, not on guesswork.
- Where the data comes from
- Every check reads the officers, people with significant control and filing dates for each company through the official Companies House API, at the moment you run it.
- How status is decided
- Someone counts as verified only when the register shows the date their verification took effect. Everyone else is shown with the due date Companies House has set for them.
- What happens to your list
- It stays in your browser and passes through our server only while the check runs. We don't keep it, and we don't use cookies for tracking.
- Who runs Muster
- GPT Shop Ltd, a UK data company registered in England and Wales, company no. 15766335. Muster isn't affiliated with Companies House.
Questions
Before you start
Anything else, email hello@gptshopltd.com.
Someone has verified but still shows as due. Why?
The register can take a day or two to update, especially when verification went through an agent. Check again later and the Changes view will show them as verified.
Does this cover new directors and PSCs after 18 November?
Yes. New appointments have to verify too, and PSCs keep their own 14 day windows. Re-checks pick up anyone newly listed on the register.
Why are corporate PSCs left out?
Only individuals verify their identity. Corporate PSCs provide information about a relevant officer instead, which isn't shown on the register in the same way.
How do re-checks work?
Open your report link in the same browser and press Check again. It runs on the same list for 60 days from purchase and shows what has changed since your previous run.
Can I edit the client letters?
Yes. Copy any letter into your email and change what you like, or export them all as a CSV to use with a mail merge.
What if a check doesn't finish?
Reopen the link and it carries on where it stopped. If it still won't complete, email us and we'll finish it for you or refund you in full.
Know exactly who still has to verify.
Check your first three clients free, then run the whole list.
Check your client list