We often get asked how to add a PO number to a registrar’s invoices.

On the registry side, this can only be done by the registrar themselves by logging into their Nominet account, going to Account Settings > Edit Address, and entering the PO number before midnight on the 7th of the month so it appears on the invoice.

At the moment, only the main admin contact can make this change, the billing contact cannot. For a better user experience, we should look at allowing billing contacts to update billing information in future development.