The paper presents principles of assessment of compliance to be observed by the suppliers of products serving the purposes of the national security and ordered by organisational units subject to or supervised by the competent minister of interior, arising from the act of November 17th, 2006. The authors also discussed the certification procedures and reference documents applied in the certification process carried out by the Product Certification Department (ZCW) of ITB MORATEX, a body accredited by the Ministry of Interior and Administration (MSWiA) in respect of OIB.