You can create an owner invoice that bills against a prime contract and then email it to your recipients. If you need to send your invoice to the project owner, this method allows them to view the invoice in your Procore (only they have a Procore user account and you've granted the user access). This proves useful when you want to capture the owner's written approval or rejection reason in writing. Procore automatically stores all replies from recipients in the 'From' address of your outgoing message in the Emails tab of the invoice.