The three fields that decide whether a certificate helps you
First, the insured entity. If the contract names one company and the certificate names a related trading name or an individual, the document may not cover the party you engaged. This is common where a small operator trades under a business name, and it is the single most frequent gap in an otherwise tidy contractor file. Compare the name on the certificate with the name on the invoice, not with the name on the van.
Second, the period of insurance. A certificate is a snapshot, and cover lapses on a date. A file holding a certificate that expired eight months ago tells you nothing about today. Third, the business description. A policy written for domestic cleaning may not respond in a commercial building, and one written for office cleaning may not respond to work at height or machinery use, so the description should match the work being done.
