For your donations to be allowed under section 80g, you must have documentation to prove them. The first thing to do is to ask for a receipt from the charity which should show its name, registration number and the contribution amount. Ask for a 80g certificate that comes with your receipt from the donation. Keep the bank statements or copies of your transactions as records of payment. It helps to have copies of any message you send to the charity about your contribution. When documents are well-organized, you will find it simpler and safer to claim your taxes.