1. Click on "Packages and Shipments"
2. Click on the "Package ID"
3. Click on "Special Request"
4. Select "Attach documents"
5. Fill in the description ( how you want your invoice to be done ("insert into the box","stick outside the box" etc.)
6. After adding description, attach the file/invoice you want us to insert with the package
*Please make sure to fill in "Content Description" and select a "Shipping Method".