One-off donation

This declaration is valid for the current tax year (6 April to 5 April), the previous four tax years and all future tax years. I understand that if I pay less income/capital gains tax than the amount of Gift Aid claimed on all my donations in the tax year in which they are received, it is my responsibility to pay any difference and that I must notify the charity of any changes to my tax status, including changes to my name or address.