Haemovigilance plays an indispensable role in confirming patient safety with regard to blood transfusions. Haemovigilance is a structured scheme of observing, identifying, reporting, investigating and analysing adverse events and reactions pertinent to transfusion and manufacturing blood products. This system is also a rudimentary part of quality control in a blood system, bringing about counteractive and preventive measures, and for the perpetual advancement of the quality and safety of blood products and the transfusion process. The data generated through the haemovigilance system helps in framing important changes in the whole blood transfusion process which are useful for better patient safety. This article momentarily reveals the history of haemovigilance, necessity of haemovigilance and also explain about the Haemovigilance program of India.