Legacy Week runs from August 31 to September 6, with Legacy Badge Day on September 5.

The week recognises the work done by the organisation to assist widows, children and orphans whose parents have served their nation.

Berrima Legacy president Barrie Iredale said Legacy was still important in Australia.

"Our service men and women, and their families, have given their health and their lives in the defence of Australia," he said.

"They defended our freedom and our right to live in a democracy.

"Legacy is still so important because we have widows, widowers and families who have lost their dearest friend, father or mother."

Legacy was established by returned veterans from World War I, who promised to assist the families of deceased and wounded veterans.

Funds raised during Legacy Week will assist widows, widowers and children with services such as counselling, special housing, medical fees, advocacy and social support, as well as contribute to children's school fees, books and uniforms.

NSW Minister for Veterans' Affairs Victor Dominello said by buying a badge, Australians showed support for the thousands of Australian Defence Force personnel currently deployed overseas and the many more who had served throughout their lifetimes.

Mr Dominello praised the efforts of volunteers who give up their time to sell and distribute badges throughout Legacy Week.

"As the minister responsible for volunteering, it's another example of an event that would simply not be possible without the generosity of hundreds of volunteers who donate their time and energy to an important cause," he said.

To donate or to find out more about Legacy, click here.