The Institute of Fundraising is planning to introduce new regulations covering house-to-house collections of donated goods.
The institute already has a code of practice covering financial door-to-door collections, but it does not apply to collections of clothing and other items.
The new regulations will be added to an updated version of its door- to-door collections code. They will apply to collections made by charities and by agencies working on their behalf.
The institute has put together a working party to draw up a draft of the new code, which is expected to be made available to the institute's members for consultation after the last of its meetings in April.
A spokeswoman for the institute said rewriting the code was likely to take about 12 weeks.
She said it was not yet clear whether the new rules would - as the Association of Charity Shops has urged - require commercial clothing collection firms that worked in partnership with charities to display information on their collection bags about how much money a charity would receive for every bag of donated goods.
Michael Lomotey, campaigns spokesman for Clothes Aid and a member of the institute's working party, said he welcomed the decision to update the code, which he said would strengthen the sector's standards.