Yusuf Mohamed Dadoo OMSG was a South African Communist and an anti-apartheid activist. During his life, he was chair of both the South African Indian Congress and the South African Communist Party, as well as being a major proponent of co-operation between those organisations and the African National Congress. He was a leader of the Defiance Campaign and a defendant at the Treason Trial in 1956. His last days were spent in exile in London, where he is buried at Highgate Cemetery; a few metres away from the Tomb of Karl Marx.

The Order for Meritorious Service is a South African National Order that consisted of two classes, in gold and silver, and was awarded to deserving South African citizens. The order was discontinued on 2 December 2002.