I assume the shipping address is where I’ll receive my order, but why do you require a billing address? Will you send my invoice there separately?
Getting a correct billing address is an essential part of processing your order and clearing your payment with your bank. The billing address is the address on file with your financial institution, and it should be entered in exactly the same way it appears on your credit card records or statement, including your name and last name. It is part of the process to identify that you are the lawful owner of the credit card being used.
You can then specify a shipping address, if this is different from your billing address. This will be the address where you would like to receive your merchandise. The invoice for your order is always included with your purchase and ships together inside the same box. No duplicate invoice will be sent to your billing address.