Is a company asking for my director ID or company registration number to verify a B2B transaction legitimate?

Business-to-business fraud increasingly targets company directors and finance teams. In a legitimate procurement or invoicing context, it is normal to exchange company registration numbers and verify VAT numbers. However, fraudsters posing as suppliers, compliance services, or regulatory bodies ask for more: personal director identification numbers, Companies House authentication codes, or access to filing portals. With this information they can file false company changes, redirect dividends, or commit other registration fraud. A separate risk is a supplier requesting a 'vendor verification' email that contains a link to a fake payment portal where your banking credentials are captured. Always verify any B2B verification request through a channel you initiated — phone the contact at their known number, not one provided in the email.