For the stages coding, review and approval there is a monitoring stage where the invoice can be sent via the Forward form.
The purpose of the Monitoring stege is for the user to be able to easily see which invoices in the work queue whose processing has started but for various reasons could not be terminated directly.
This is shown by the fact that the invoices being monitored have the status Monitoring [stage] in the work queue.
Time limit in stage Monitoring
For invoices that are sent for monitoring, the system calculates a time limit which falls a number of days ahead in time from when the invoice is sent to the monitoring.
The number of days can be specified in the administration tool under System configuration - System settings - Flow, the parameter HoldLimit.
When the time limit has passed, the invoice returns to the regular stage.