If you have not entered a specific invoice address to which all credit invoices are sent, invoices will be sent to the person with the role "contact person" in Mynt.
Most of the time, this is the person who first opened your Mynt account.
Invoices are sent electronically to the email address registered in your account as the designated contact person's email.
To verify or update the email address where invoices are sent, log into your Mynt customer account and navigate to the profile or contact settings section. Ensure the email address listed is up-to-date and accurate.
If you want to add or change your invoice address, you can do that in the web.
Click on account->settings and then you can edit the invoice adress. For more information read here