This article outlines how you can hide the description of a charge within an invoice if you do not want the text to be displayed to the client. 

This may be desired if charges are grouped together under one, client-facing description. This is often used in conjunction with the 'Related Charges' functionality.

To hide a charge description from the invoice you would need to add '#' at the beginning of the description.

The '#' character can be added when the charge is created or at Step 2 of the Billing Wizard.