Startup Idea : Platform to confirm that someone gave $ to charity

Use cases:- You want to give your old phone to the person, who gives the specified amount of money to a charity. - You organize an event. You want only people who care about it to come. You do not want to care about accounting. So you want to give the ticket only to people who give a certain money to charity.A platform that could confirm, that someone gave a specified money for a charity would be handy. We are working on it. Wanna help? Do you know about something similar? Let us know info@fundlamb.com