More than 100,000 people have signed an online petition calling for a man dubbed the 'British Schindler' to be honoured with a commemorative stamp.
Sir Nicholas Winton saved hundreds of children from the Nazis on the eve of the Second World War, organising eight trains to take 669 children from Prague to London in 1939.
He also helped to find foster families for the youngsters once they had arrived in England - and kept his heroic acts a secret for more than half a century.
He died last month at the age of 106.
A Change.org petition has now been set up by two men, Justin Cohen and Richard Ferrer, with the aim of ensuring his name - and his legacy - lives on.
Since being launched in the wake of Sir Nicholas' death, it has attracted more than 102,000 signatures.
The campaign was launched by the Jewish News, in conjunction with the Holocaust Education Trust, and was backed by Sir Mick Davis, who chaired the Prime Minister's Holocaust Commission.
As the idea gathered popularity, Royal Mail promised to put his name forward for consideration.
"It is clear that there is a strong desire to see Sir Nicholas Winton honoured on a stamp," a spokesman said.
"Given the time frames we work to, it is unlikely he would feature on a stamp in 2016, but do be assured that his name will be put forward for consideration in a stamp issue beyond then."