How to identify posted invoice as sent

QUESTION: How can I identify a posted invoice as sent?

RESPONSE: To be able to identify an invoice as sent and clear it from the “in-progress, posted and not yet sent”  list to complete the billing cycle, the invoice needs to be posted and printed and/or emailed in final form. If the invoice for an client and matter set to be e-billed (has a task set that requires an e-bill format), the invoices must be posted, and the e-bill generated (even if it is also printed or emailed in final form). As the e-bill being sent takes priority, it is the Sent E-bill option that will be enabled to clear the invoice from the list, regardless of how it was sent (by post, by email or downloaded to a web-site).

In addition, users without “Third Party Invoice Management” security rights, must be the owner of the invoice, before they can identify the invoice as “sent”.