## Update PO Shipping Information (Single Tracking)

We have added a new endpoint that allows you to update the Tracking information of an existing [Purchase Order](/content/help/omnichannel-ecommerce/managing-pos/index.html). Note that you can use this endpoint only if the [Client Setting](/content/help/omnichannel-ecommerce/settings-overview/index.html) **Enable Multiple Tracking Numbers On PO** is disabled.