To bill a 3rd party or receiver account, navigate to the Quick Ship page and at the bottom find the Payor dropdown.
Change the default from Sender to either Receiver or 3rd Party.
Fill in the Account Number, Billing Zip Code and Country.
From there, select the service you want to use and purchase your label.
NOTE: You will need your own carrier account to ship 3rd party with.
Example: If you are shipping UPS or FedEx Ground, you will need your own UPS or FedEx carrier account in order to support 3rd Party or Receiver Billing.
Once you print the label, check to ensure the label states Bill 3rd Party or Bill Receiver, to ensure the proper account is being billed.