This Technical Specification defines the requirements for the Secure Application Module (SAM) used in the secure monitoring compliance checking concept. It specifies two different configurations of a SAM:—Trusted Recorder, for use inside an OBE;—Verification SAM, for use in other EFC system entities.The Technical Specification describes—terms and definitions used to describe the two Secure Application Module configurations;—operation of the two Secure Application Modules in the secure monitoring compliance checking concept;—functional requirements for the two Secure Application Modules configurations, including a classification of different security levels;—the interface, by means of transactions, messages and data elements, between an OBE or Front End and the Trusted Recorder;—requirements on basic security primitives and key management procedures to support Secure Monitoring using a Trusted Recorder.This Technical Specification is consistent with the EFC architecture as defined in ISO 17573 and the derived suite of standards and Technical Specifications, especially CEN/TS 16702-1:2014 and CEN/TS 16439.The following is outside the scope of this Technical Specification:—The life cycle of a Secure Application Module and the way in which this is managed.—The interface commands needed to get a Secure Application Module in an operational state.—The interface definition of the Verification SAM.—Definition of a hardware platform for the implementation of a Secure Application Module.