Is it permissible for a charity to use part of donated funds to pay for promotion and advertising?

Summary

Parties collecting donations, whether non-governmental organisations, companies or mosques, may use part of the funds for promotion provided the donors have given their permission. Permission can be obtained by stating clearly in the advertisement the intention to use a certain percentage for promotion costs. If the money has already been collected, the donors must be informed and their permission obtained first. The amount used should be only as needed and spent prudently.

Written in our own words from the original fatwa — check the source before acting on it.