The charity, which provides aid relief to some of the poorest regions in the world, is to encourage former donors to contribute to its Easter appeals, in an attempt to convert them into regular donors again.
The scheme will aim to increase SCIAF's annual Lent fundraising figure from £500,000 to £750,000 by promoting the charity's 'Wee Box', which invites people to put loose change from sandwiches and fizzy drinks into donation boxes at lunch-times.
BD-NTWK, which was appointed to the SCIAF account after a three-way pitch at the end of 2006, created an online , which links through to the charity's official .
Clea Ferguson, spokeswoman for SCIAF, said: "The Wee Box will focus people's attention on how little they have to do to make a real change and also provide a focal point for groups and individuals to make it happen.
"It's a concept that has a long shelf life and one that we will be able to develop year on year so that people can expect it as part of the Catholic and SCIAF calendar."
In January, BD-NTWL unveiled the redesign of SCIAF's member's quarterly magazine.