It's gratifying to see that people are beginning to take seriously the problem of the archives of voluntary bodies of various kinds. There is a good blog post here on the Voluntary Action History Society blog, A New Campaign for Charity Archives and the British Records Association annual conference taking place tomorrow is Beyond the Fringe: the archives of pressure groups. These are the kind of organisations that may not even have a permanent HQ, so that their records get passed around as responsibilities change, and in addition they may be understandably devoting all their funds to the core activity for which they were founded.
Records of local organisations may find a home in the relevant local record office, and organisations which fall into specific areas may find that there is a specialist repository that may take them: in the Wellcome we hold a significant number of collections of Medical Charities and Pressure Groups as well as records of International Organisations. But there are still many organisations which do not fall into existing archival safety nets.