The institute is awaiting the results of donor research commissioned by the Fundraising Standards Board. The main debates so far have been about inserts and environmental issues.
"The consultation has been extended for the perfectly sensible reason that this research is taking longer than expected," said Lindsay Boswell, chief executive of the institute. "It doesn't make sense for the consultation to close before that information is ready."
Boswell said the institute's involvement in proposals for the future of Gift Aid (Third Sector Online, 1 October) had left it with less time to ask the public about direct marketing. The consultation will now close at the end of November.