This document provides information about Gift Aid, a form of tax relief for UK charities that allows them to claim back basic rate tax on donations. It explains that charities can claim an additional 25p for every £1 donated. It also outlines how UK charities can enable Gift Aid contributions through DonorBox by checking the Gift Aid option in their Localization settings and informing donors. Special rules for sponsored challenges, membership fees, event tickets and volunteer expenses are also covered.