Charities are missing out on millions of pounds in tax breaks because of fundraisers' shortage of skills, according to Cathy Pharoah, research director at CAF.
"Not all fundraisers know how to give advice and not all charities understand what the tax breaks are," Pharoah told a conference on giving held in Brussels last week.
She estimates that £2.1bn of donations could easily be made tax-efficient if charities were "a bit more imaginative in their fundraising".
Her case is supported by new research released today by the Institute of Fundraising, which reveals that less than 50 per cent of the public is aware of Gift Aid.
Only 45 per cent of the population has heard of Gift Aid, with men scoring only 38 per cent. Even fewer people - 25 per cent - are aware of the tax breaks available through payroll giving, the research reveals, and only 43 per cent know how to make their direct debit donations tax-efficient.