What happens to an invoice in Xero once it is marked as "Viewed" by the customer?

Once an invoice is marked as "Viewed" by the customer, it receives a date and time stamp, and its status changes to reflect this action. This functionality is vital for tracking customer engagement with invoices and provides insight into when a customer has accessed the invoice, which can be helpful for follow-ups or inquiries. The date and time stamp add an additional layer of documentation, indicating the customer's receipt of the invoice, enabling better management of accounts receivable.

The other options do not accurately reflect the behavior of invoices within Xero upon being marked "Viewed." For instance, invoices are not automatically archived or moved to the Approved tab as a result of being viewed; those actions depend on other criteria. Additionally, marking an invoice as viewed does not make it eligible for editing, as modifications are governed by the invoice's status and other conditions established within the system.