Asterisk Intervention lets you add an asterisk (*) to a Sales Order Number in shipping to set the Intervention checkbox on the order to override Auto-Charge or Auto-Invoice.
Using UPS Worldship, FedEx Ship Manage, Stamps.com Professional, etc, Sales Order Number can be posted to BigBusiness to add Tracking, set Shipped, and Auto-Invoice.
Adding an Asterisk (*) to the Sales Order Number will also set Intervention to stop any automatic actions such as Auto-Charge and Auto-Invoice.