Add Reference Values to Labels

Reference values allow you to attach a custom label or tag to a shipment which can allow you to track a shipment by that value. It can also be printed on the label as text or a barcode.

RMA numbers, invoice numbers, and PO numbers are common reference values.

API requests using reference values:

• UPS label with reference values
• Tracking UPS package by reference
• Tracking FedEx package by reference
• Stamps.com label with reference value
• DHL label with reference value

Parameters

See parameters: reference_code and reference_value

Example

...
    "packages": [
      {
        "weight": 4,
        "reference_code": "PO",
        "reference_value": "12382871",
        "reference_barcode": true,
        "reference_code2": "IN",
        "reference_value2": "10000"
      }
    ],
...