There is some confusion around what can and should be certified.
A DoC has ALWAYS to be established by the manufacturer, irrelevant of the risk class of a medical device or in-vitro diagnostic.
Next to a DoC, a conformity assessment, either as type-examination or as technical documentation assessment, is carried out by Notified Bodies for products with a higher risk class then class I. A successful conformity assessment will result in a certificate issued by the Notified Body. These Certificates of Conformity (CoC) are official, authority authored documents.
So, the only two documents to be expected are the Declaration of Conformity (DoC) or/and the Certificate of Conformity (CoC). Any other title or reference will indicate an adulterated document or raise suspicion on counterfeit product.