Why did I get a receipt for Rs.0 (Nil)?

You'd get a receipt for Rs.0 (Nil) if your company also contributes to your GiveIndia account. In such a case, when you make a donation, your company's contribution is first taken into consideration and then your individual contribution (subject to the total donation amount). When your company's contribution alone covers your selected donation option, you get a receipt for Rs.0 (and your company gets a receipt for its contribution).