Once the claim form is complete check the "Mark Complete" box and update the form.

This box exists to allow users to start a form and then return and edit it later - rather then needing to keep getting a notification message that the form is incomplete. It also serves to tell the system that the form is expected to be completed and that any internal processing that may use stats from the form can commence.

Do not confuse marking a form complete with signing (authorizing) the form.

Mark Complete tells the system that you are finished editing the form.
Authorization is a formal digital signature that initiates the workflow processing and is recorded in the audit trail.