Notified body

A marking declaring that a product meets the applicable European Union legislation; for construction products it means performance has been assessed and declared against a harmonised European standard under the Construction Products Regulation. It is affixed by the manufacturer and supported by a Declaration of Performance and, where required, third-party assessment by a notified body.

The UK Conformity Assessed marking, introduced after the UK left the EU as the domestic equivalent of CE marking for goods placed on the market in Great Britain. Conformity is assessed against designated standards, with any required third-party work carried out by UK approved bodies; CE marking remains accepted for many product types under continuity arrangements.

An independent organisation, usually accredited by a national accreditation service, that assesses products, management systems or personnel against standards and issues certificates of conformity. Third-party certification gives specifiers confidence beyond a manufacturer's own declaration of performance.

The formal document a manufacturer must issue for a construction product covered by a harmonised European standard, declaring the product's essential characteristics and the performance values or classes it achieves. Drawing up a DoP is a legal prerequisite for CE marking under the Construction Products Regulation.