If you are shipping products, including a packing slip with the shipment provides clear communication to your customers. Indicate what items are included as well as any items that were ordered but not shipped. Not only does a packing slip inform customers, it can also help reduce mistakes before shipping. This is intended as an addition to a sales invoice.
Smartsheet is a spreadsheet-inspired work management tool with robust collaboration and communication features. Its Google Docs integration and pre-built invoice tracking templates make it even easier to manage customer information, create, send and track multiple invoices at once, and quickly organize the details.