Parris shared his experiences of running Remember a Charity with British fundraising consultant Daryll Upsall, whose Madrid-based firm is spearheading the campaign.
Seven Spanish NGOs have signed up to the campaign, which was launched with a two-page editorial in Spain's biggest selling newspaper, El País. Members include Spanish affiliates of Unicef, WWF, Oxfam and Amnesty International. Between them they have spent €24,000 on the campaign.
Parris became involved when he met Upsall last year at a conference. "We learned a lot from Remember a Charity about costings, why they broke their website down into certain sections, how to get charities on board and, especially, how to coordinate as project with multiple charities," said Upsall.
The campaign, called "would you sign to leave a better world?", took four years to develop. "There are currently no fundraisers in Spain solely working on legacies - compared with 24,000 in the US and several hundred in the UK," said Upsall. "Most fundraisers didn't know their charities received any legacy income because it goes straight to the legal or finance departments."
Press releases were sent out across the Spanish media and Upsall said there had been a "huge" response. "Some of the charities involved have even complained that they are getting too many calls from journalists about it," he said.
He also said the campaign was likely to benefit the whole Spanish charity sector. "We have already had emails from other organisations that are not part of the seven thanking us for the initiative." He said. However, he admitted that the original seven - "the only ones brave enough to join out of the 25 we invited" - stood to gain the most since the campaign website directly promotes them and links to their own sites.
"The seven charities are currently discussing with us the next stages of the campaign, the budget they are willing to commit and if and when they will allow new charities to join - and for how much," he said.