It depends on your preferred payment method. For instance, if you are using PayPal, Skrill, (or other payment methods), the message will be sent to the email address that is linked to your PayPal or Skrill account respectively. And if you are using the payment method that didn’t require the email address during the registration (e.g. Visa/MasterCard debit or credit cards, Bitcoin, American Express, etc.), you will need to enter your email address on the shopping cart page so that we can send our message to your inbox.