Simply visit givey.com/charity and follow the instructions - you'll need a soft copy of a bank statement and the details of your charity to hand, once you're setup you'll be ready to share your Givey link and receive donations.
Please note - Your bank statement must contain the following:
Account Number
Sort Code
Charity registered address
This newer the official bank statement, the more likely you won't have any problems. Usually we ask that you send a copy, that is no more then 3 months old!