Here's a potentially handy web site if you do business with the South Australian government, and need to track your invoices.
One of the problems with dealing with large organisations such as state governments is following the progress of invoices through their systems.
Just because you've imposed or agreed certain payment terms, processing is an essentially bureaucratic process that takes as long as it takes.
Suppliers to the South Australian government can now track the status of their invoices and get an estimated time to payment via My Invoice.
The only similar facility we have been able to find is the Western Australia government's iSupplier, but it seems that is not yet in full production.
If your state or territory provides this kind of service, please leave a comment below including the URL.