I paid by credit card. Why did PayPal send me a receipt?

PayPal offers the option of using your credit card online to make a purchase instead of your PayPal account. When you use this feature, you will receive an email confirmation similar to the following for your purchase: 
 

This email confirms that you have paid Voices Inc $xxx.xx USD using PayPal. 
 

This credit card transaction will appear on your bill as "PAYPAL PURCHASE *Voices" or "SUREPAY ESCROW *Voices"
 

As the recipient of the funds, we are not informed as to the funding source, only that funds were sent through PayPal.