More than 100 solicitors are to waive their fees for drawing up wills as part of a drive to help children in Malawi.
Justice Minister Cathy Jamieson with Dr David Livingstone's will
They will ask clients to donate their fees in May to Will Relief Scotland.
It will split the money among five international charities, including one which co-ordinates the Mary's Meals project in Malawi.
More than 150 law firms have signed up to the scheme, which will also help charities working in Eastern Europe, Asia and Latin America.
The campaign was welcomed by Justice Minister Cathy Jamieson at its launch in Edinburgh, where Dr David Livingstone's testament was on display.
The explorer and missionary was the first Scot to establish links with Malawi.
Ms Jamieson said: "I am sure there will be many more Scots willing to donate the cost of making their will to organisations such as Scottish International Relief.
"It does a fantastic job providing a school meal for thousands of children through the Mary's Meals project and the money from Will Relief will mean they can provide support for many more."
She said she hoped the scheme would encourage people across Scotland to consider drawing up a will, which usually costs between £200-£600.
Oban solicitor Graeme Pagan, founder of Will Relief Scotland, said: "The charities receiving that money have been specifically chosen because of the different countries and continents in which they are working.
"The public can be sure that the donations will not have limited effect but will be used to alleviate suffering in a very large number of the world's poorest countries."
Campaign patron Sir Tom Farmer said: "Will Relief is a great opportunity for people to support the vital work of these excellent charities and at the same time put their affairs in order by making a will."