Peter Vicary-Smith said CRUK was in favour of joint initiatives to inform the public about fundraising in general, but "would not defend a type of fundraising we have already decided not to do".
His remarks come as the Institute of Fundraising and Shelter are calling for charities to put their names to an education programme to address recent media criticism of face-to-face.
Vicary-Smith said CRUK had decided against using face-to-face two years ago, partly because it put people in the uncomfortable position of saying 'no'.
He added that public confidence was "a much bigger issue than any short-term financial gain".
- See news analysis, page 12.