In the developed world, most blood donors are unpaid volunteers (voluntary non-remunerated repeat donations, VNRD) who donate blood for a community supply. In poorer countries, established supplies are limited and donors usually give blood when family or friends need a transfusion (directed donation). Many donors donate as an act of charity, but in countries that allow paid donation some donors are paid, and in some cases there are incentives other than money such as paid time off from work.