A declaration of conformity is an official document issued by a manufacturer or supplier to certify that its product or service complies with applicable standards, regulations and safety requirements. This declaration is often required for certain types of products, such as those sold in the European Union (EU) or other regions where compliance with standards is essential.

The declaration of conformity contains essential information, such as the product description, references to specific standards or regulations to which the product complies, the name and address of the manufacturer or supplier, and other relevant details. It certifies that the product meets the legal and technical requirements in force, which is often associated with conformity markings such as CE marking in Europe.