Knowledge Base
Practical, in-depth guides on UK VAT compliance, Companies House filings, B2B supplier screening and fleet regulations — written to help finance, procurement and risk teams navigate UK business compliance with confidence.
How to Verify UK VAT Numbers Before Paying Invoices (Step-by-Step Guide)
A step-by-step guide for finance and AP teams to verify a UK VAT number against HMRC before releasing payment, with format rules, fraud signals and a free lookup workflow.
Understanding Companies House Filing Deadlines and Penalties
A clear explanation of UK company filing deadlines — confirmation statements, annual accounts and overdue penalties — and how to monitor them for your own company and your suppliers.
Dissolved vs Active Companies: How to Screen B2B Suppliers in the UK
How to read a Companies House company status and use it to screen B2B suppliers — understanding active, dissolved, liquidation and administration, and what each means for your risk.
A Complete Guide to London ULEZ & Congestion Charge for Commercial Fleets
How commercial fleet operators identify the London ULEZ and Congestion Charge zones, check vehicle compliance, and budget for daily charges using postcode lookups.
Understanding SIC Codes: What They Tell You About a UK Company
What SIC codes are, how Companies House uses them, and how risk teams can use them to classify suppliers, detect anomalies and flag potential shell entities.
Confirmation Statements for UK Companies: What They Are and Why They Matter
A plain-English guide to the Companies House confirmation statement — what information it contains, when it is due, the consequences of missing the deadline, and why B2B buyers should monitor it.
The PSC Register: How to Find Who Really Controls a UK Company
A practical guide to the People with Significant Control register — what it contains, how to use it to uncover hidden ownership in UK companies, and why it matters for B2B due diligence.
E-Commerce Seller's Guide to UK VAT OSS, MOSS and Cross-Border Compliance
How online sellers trading from the UK or into the UK handle VAT on cross-border digital and physical sales, including One Stop Shop (OSS) and place-of-supply rules.
Supplier Onboarding KYC: Verifying UK Companies Before You Sign a Contract
A step-by-step KYC checklist for verifying a new UK supplier — combining company status, VAT validation, PSC checks and credit screening into a repeatable onboarding workflow.
UK Company Formation Types Compared: LTD, PLC, LLP and LLP — Which One Is Your Supplier?
A comparison of the four main UK company types — private limited company (LTD), public limited company (PLC), limited liability partnership (LLP) and partnership — and what each tells you about the supplier you are onboarding.
Registered Addresses and Virtual Offices: What They Tell You About a UK Company
How to read a UK company's registered address on Companies House, why it matters for B2B risk, and how to spot virtual office red flags.
Companies House Open Data: How the Open Government Licence Powers Tools Like qxx.uk
What the Open Government Licence v3.0 means for developers and businesses using UK public data, how Companies House makes its API available, and the obligations it grants.