The institute is revising its code of practice on outdoor fundraising events such as Three Peaks Challenges. Its new draft code, out for consultation until 19 February, notes that adverse effects on local residents, facilities and wildlife "bring charities' fundraising into disrepute" and "risk the future reputation of challenge events as a form of fundraising."
The institute hopes that outdoor fundraising practice will improve by the summer. The number of outdoor challenges is at its highest in the warmer months.
Louise Richards, director of policy and campaigns at the institute, said: "An important part of promoting best practice involves exposing bad practice. To this end, we wish to ensure that all charities taking part in such events are following the best practice standards, as set out in the draft code."
The decision to invite complaints comes after the institute ran a campaign last year in which it asked members to complain about direct mail campaigns they believed breached its code of practice.