Check
Required, it must be the email account which has received the license code, no more than 200 chars
Required, no more than 100 chars
Optional, no more than 200 chars, and need not include country
Optional, no more than 300 chars, extra information will be displayed in the invoice. For example, VAT No.
The invoice will be sent to PayPal payer email in 24 hours, note that shipping email won't receive invoice if it's not same as payer email.