Where do I pay my invoice
You are able to fulfill an invoice for any given nation by going into Settings>Billing>Invoices. There you will see a list of all invoices (open and closed) and are able to fulfill these using a credit card on file or using a check by referencing the respective invoice number. You can also download a pdf invoice for all invoices for your records.
Complete and current information on how to use NationBuilder is available in the documentation section.