How do I attain the Charitable Donation guarantee?

Definition: At least 1% of this brand’s sales go to a charity partner.

How do I qualify for this icon & what supporting evidence do I need? 

• What charity do you donate to? 
• Is it a flat fee or a specific percentage of profits you donate? (which equates to at least 1% of sales)
• The charity name must be included in your brand profile bio 
• Please include receipts and the charity registration number