The event_type_code is used to classify the different shipping events.

EVENT_TYPE_CODEDESCRIPTION
label_createdShipping label has been created
origin_scanFirst entry in the shipping carrier's network
transitRegular transit event
incidentAny delivery incident
out_for_deliveryPackage is out for delivery, it will be delivered today
failed_attemptUnsuccessful delivery attempt
pickup_pointPackage left at pickup point
deliveredPackage delivered or picked up from pickup point
returnPackage will be returned to sender
drop_offThe parcel has been dropped off at a pickup point (Available only for return account)
expiredPackage tracking has expired (Shipup is not able to track this package anymore, this is the final event)