The spontaneous reporting system is a passive surveillance system where health professionals voluntarily report adverse drug reactions directly to regulatory authorities or pharmaceutical companies. It involves 3 main processes: 1) data acquisition from reported cases, 2) data assessment of individual cases and pooled data, and 3) data interpretation to generate safety signals. Countries have different reporting forms, like the Yellow Card used in the UK since 1964. Factors like educational campaigns and inclusion of reporting options in prescription pads have helped increase reporting rates in the UK. India's Pharmacovigilance Programme similarly encourages voluntary reporting of all suspected adverse reactions via established adverse drug monitoring centers.