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How Do We Get Warned When a Customer or Supplier Files Something Worrying at Companies House?

Monitoring Companies House changes by hand means late warnings of insolvency or director changes. SpiderHunts builds alerts for the companies you rely on.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Businesses find out late that a customer has entered administration or a supplier has changed directors or filed overdue accounts. SpiderHunts builds a monitor on the official Companies House API and streaming feed, plus the London Gazette for insolvency notices, that watches the companies in your CRM or accounts system and alerts the right person when something relevant changes.

The administration notice you saw too late

A customer with a large unpaid balance goes into administration. Looking back, the warning signs were public: overdue accounts, a string of director resignations, a charge registered against the business, a winding-up petition in the Gazette. Nobody in your business was watching.

Or a key supplier changes ownership, and you only discover it when their terms change. Or a subcontractor you are about to sign with was only incorporated a few weeks ago.

Why nobody watches the filings

The information is public, but checking it by hand does not scale. Credit control has hundreds of customer accounts. Purchasing has dozens of suppliers. Looking each one up on Companies House every month is nobody's job, so it happens occasionally, usually after something has already gone wrong.

EventWhy it matters
Accounts or confirmation statement overdueOften an early sign of difficulty
Director appointments and resignationsChanges in control or stability
New charges registeredNew secured borrowing
Change of registered office or nameRestructuring, or records needing update
Insolvency notices in the GazetteWinding-up petitions, administrations, liquidations
Proposal to strike offThe company may cease to exist

Companies House has a follow feature for individual companies, and credit agencies sell monitoring. Both help. What they rarely do is connect to your own customer and supplier lists, weigh changes by your exposure, and send the alert to the person who can act.

What finding out late costs

Bad debts from customers who were visibly in trouble. Deliveries made on credit to a business already heading for administration. Supply disruption when a supplier fails. Contracts signed with companies that should have been checked more carefully. And customer records that go stale when companies change names or addresses.

Credit decisions also end up based on how a customer pays today rather than what their filings say about tomorrow.

Onboarding is the other gap. A new supplier or subcontractor is often approved on a quote and a phone call, and nobody looks at how long the company has existed, whether its accounts are filed on time, or whether the directors have a trail of dissolved companies behind them.

How we build a filings monitor

  1. We pull your customer and supplier lists from Xero, QuickBooks, Sage, your CRM or ERP, and match each to its Companies House number, with uncertain matches reviewed by a person.
  2. We connect to the official Companies House API and its streaming feed, so changes to watched companies are picked up as they are published.
  3. We check the London Gazette's data for insolvency notices against the same list.
  4. Each event is scored by type and by your exposure, such as the outstanding balance from your accounts system or whether the supplier is critical.
  5. Alerts go to the right person: credit control for customers, purchasing for suppliers, with a link to the filing and a short explanation of what it means.
  6. Company names and addresses in your systems can be updated from the official record, with changes logged.
  7. New customers and suppliers are checked at onboarding, showing incorporation date, filing history and any warning signs.

The monitor uses official, published data through the routes Companies House and the Gazette provide. It gives early warning, not a credit rating, and decisions stay with your team.

Warnings while there is still time

Credit control hears about an overdue filing or a petition while the balance can still be managed, such as by moving a customer to pro forma terms. Purchasing sees ownership and director changes at key suppliers as they happen. Your records stay in step with the official register, and new accounts are checked as a routine step rather than when someone remembers.

Could this help you?

  • You have been caught out by a customer's insolvency
  • Nobody checks Companies House for existing customers or suppliers
  • Credit decisions rely on payment history alone
  • Customer names and addresses in your systems are out of date
  • New suppliers are not routinely checked before contracts

FAQ

Frequently asked questions

The questions readers ask us after this guide.

Still have a question?

Ask us directly — a senior engineer will get back to you.

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Is the Companies House data free to use?

Companies House provides its API and streaming feed for public use under its terms, with rate limits. We build within those limits.

Does this replace a credit reference agency?

No. It watches official filings for the companies you care about. A credit agency adds scoring and payment data, and some businesses use both.

Can it cover sole traders or partnerships?

Companies House covers registered companies and LLPs. Sole traders and ordinary partnerships are not on it, so the monitor flags those as outside its coverage.

What affects the cost?

The number of companies watched, which systems hold your lists, and how alerts are scored and routed.

Keep reading

More on Problems We Solve

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Want early warning on key companies?

Tell us which companies you need to watch and what you would do with a warning. We will say what a monitor would involve and whether Companies House's own follow service or a credit agency already covers your need.

  1. You tell us what you needTwo minutes on the form, or a message on WhatsApp.
  2. A senior engineer reviews itAnd comes back with questions, a realistic range and an honest view on fit.
  3. Free 30-minute scoping callWe talk through scope, options and a realistic estimate — with no obligation.
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