post
https://api-test.envia.com/ship/cancel/
Cancel an existing shipment and request a label refund from the carrier. The shipment must not have been picked up or entered the carrier network.
When to use: Call this endpoint when you need to void a previously generated label — for example, if the order was cancelled, the address is incorrect, or you need to regenerate the label with different details.
Prerequisites:
- Valid JWT authentication token (Bearer)
- The carrier identifier (e.g.,
fedex,dhl,ups) - The tracking number of the shipment to cancel
Key behaviors:
- Returns a confirmation status indicating whether the cancellation was accepted by the carrier
- Refund processing times vary by carrier
- Some carriers only allow cancellation within a limited time window after label generation
- Labels that have already been scanned by the carrier cannot be cancelled