The United Nations Foundation has announced that it will donate $1 dollar for each of the first 100,000 signatures to an online petition aimed at battling violence against women.

18,000 worldwide have already added their names to the campaign – “Say NO to violence against women” – since its launch last November. The campaign is run by the UN Development Fund for Women (UNIFEM).

To find out more about the campaign, and to sign on, click here.