CompanyCheckr blog

Guides on UK company checks

Practical walkthroughs on Companies House, due diligence and spotting red flags.

25 July 20269 min read

Director background check UK: the complete 2026 guide

How to run a proper background check on any UK company director using free official sources — disqualifications, phoenix patterns, PSC crossovers and adverse media, with a practical workflow you can repeat.

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25 July 20268 min read

UK company registration number (CRN): format, prefixes and how to verify one

Everything you need to know about UK company registration numbers — what they are, how to read the prefixes, where to find one, and the four-step workflow to verify a CRN before you sign a contract.

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The complete guide to UK company due diligence in 2026
25 June 20263 min read

The complete guide to UK company due diligence in 2026

A practical, step-by-step framework for verifying any UK company before you sign, supply or invest.

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AML compliance for UK SMEs: what you actually need to do
25 June 20262 min read

AML compliance for UK SMEs: what you actually need to do

An AML primer for UK SMEs that strips out the jargon and explains exactly what a small regulated firm needs in place.

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KYB explained: Know Your Business checks for UK suppliers
25 June 20262 min read

KYB explained: Know Your Business checks for UK suppliers

What Know Your Business (KYB) means in practice, how it differs from KYC, and the data that makes a UK KYB check defensible.

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How to spot a phoenix company before you trade with one
25 June 20262 min read

How to spot a phoenix company before you trade with one

Phoenix directors close one company owing money and open another doing the same thing. Here is how to spot the pattern early.

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Companies House filings explained: a non-accountant’s guide
25 June 20266 min read

Companies House filings explained: a non-accountant’s guide

Confirmation statements, accounts, charges, AP01s, TM01s — what each Companies House filing actually means.

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Persons of Significant Control (PSC): what they reveal about a UK company
25 June 20262 min read

Persons of Significant Control (PSC): what they reveal about a UK company

PSCs are the people who really own and control a UK company. Here is how to read the PSC register properly.

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Sanctions &  PEP screening for UK businesses: a practical primer
25 June 20266 min read

Sanctions & PEP screening for UK businesses: a practical primer

What UK sanctions actually require, who counts as a PEP, and how to screen counterparties without drowning in false positives.

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Red flags in UK company accounts: how to read between the lines
25 June 20262 min read

Red flags in UK company accounts: how to read between the lines

Even small-company accounts tell a story if you know what to look for. Here are the warning signs that show up before a company fails.

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Onboarding new clients: a UK KYC checklist for accountants & law firms
25 June 20262 min read

Onboarding new clients: a UK KYC checklist for accountants & law firms

A copy-and-use UK KYC checklist for accountants, solicitors and other regulated professionals onboarding a new business client.

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Supplier risk monitoring: why a one-off check isn’t enough
25 June 20262 min read

Supplier risk monitoring: why a one-off check isn’t enough

A clean check on day one tells you nothing about day 200. Here is why continuous supplier monitoring is now the UK standard.

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How to check if a UK company is legitimate
22 June 20262 min read

How to check if a UK company is legitimate

A practical guide to verifying a UK company using official Companies House data, filing history, officers and cited news sources.

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