Most organisations check a supplier carefully once, when it's onboarded: company details, financial health, insurance, certificates, a questionnaire. After that, the file sits still while the supplier changes. Directors come and go, ownership moves, a subsidiary is added to a sanctions list, accounts are filed late, a factory is linked to labour abuses in the press, a certificate expires.
The information is out there, but it's spread across Companies House, the UK Sanctions List, the government's debarment list, the modern slavery statement registry, your risk data provider's feeds, and the supplier's own documents. A category manager with 200 suppliers can't read all of it. So reviews happen on an annual cycle, if at all, and the first sign of trouble is often a failed delivery or a question from a customer.
The stakes have risen. Large organisations can now be prosecuted for failing to prevent fraud by people acting for them, with reasonable procedures, including due diligence, as the only defence. Public sector buyers assess suppliers against the Procurement Act's exclusion grounds. The government plans to make modern slavery statements mandatory in content and backed by penalties. Any monitoring has to be accurate, too: an alert that gets a supplier's name wrong, or repeats an allegation as fact, creates its own legal risk.