Decontamination of medical devices plays an important role in the prevention of health care-associated infections. It includes cleaning, disinfection and/or sterilization. The processes involved in decontamination are complex, require specific infrastructure and equipment, and involve several sequential steps that need to be performed correctly – from device collection and receipt by the decontamination unit to processing, storage and distribution throughout the facility. Quality control procedures (such as validation) at each step of the decontamination process are of the utmost importance to ensure the correct functioning of the equipment and processes. This aide-memoire presents a concise overview of important advice and key elements at a glance.