The Guide Dogs for the Blind Association

What they did:

Between 2008 and 2015, The Guide Dogs for the Blind Association wealth screened more than 1,770,221 supporters.

Between 2010 and 2016, The Guide Dogs for the Blind Association used this approach to match 248,094 telephone numbers to supporters. Between 2014 and 2015 it also used this approach to identify supporters who had not agreed to gift aid their donations to the charity, but had agreed to gift aid donations to other charities.