UPS Paperless Invoicing is a free service that eliminates paper invoices by electronically transferring your shipping information to UPS, thereby expediting the clearance process for Customs officials. While it is not required to have this service set up, we have found that it provides the most accurate information, allowing you to integrate your UPS account with much more ease. If you have any issues integrating your account, consider setting up UPS Paperless Invoicing.
Troubleshoot: Error connecting UPS account
Am I required to enter UPS invoice information when integrating with ShippingEasy?
What is UPS Paperless Invoice and how do I enroll?
Why did my UPS label fail even though my UPS account is connected?