About different invoice statuses

An invoice has a Status. The following invoice statuses are used:

Paid ( publish )

Payment has been paid/received for the invoice. Notification emails are sent to User & Admin on invoice has been marked as paid.

Pending Payment ( wpi-pending )

Invoice is unpaid or no payment completed yet. If someone leave the checkout process without complete the payment when it redirects to the gateway site like PayPal, 2Checkout etc.

Processing ( wpi-processing )

Payment has been paid/received for the invoice, but still invoice is awaiting fulfillment. Notification emails are sent to User & Admin on invoice has been marked as processing.

On Hold ( wpi-onhold )

Awaiting payment for the invoice, sometime payment needs to be confirmed. Notification emails are sent to User & Admin on invoice has been marked as on-hold.

Cancelled ( wpi-cancelled )

Cancelled by an admin or the customer, no further action required. A notification email is sent to Admin on invoice has been marked as cancelled.

Refunded ( wpi-refunded )

Refunded by an admin – no further action required. Indicates payment amount has been transferred back to the customer. Notification emails are sent to User & Admin on invoice has been marked as refunded.

Failed ( wpi-failed )

Payment process failed or was declined by gateway (i.e. PayPal) for the invoice. A notification email is sent to Admin on invoice has been marked as failed (if invoice status previously processing or on-hold).

Renewal ( wpi-renewal )

This refers to a renewal payment for a subscription for the invoice which uses recurring billing.