Void the active shipping label for this package
fulfillment:writeDelegates to voidShippoLabel in routes/shipping.mjs via voidLabelForPackage canonical helper. Returns 422 if Shippo void call fails (AUDIT-009-G3 safety contract). Package reverts to un-labeled state.
Authorizations
API key issued per entity via Settings > Developers > API Keys.
Each key carries scopes (e.g. orders:read, products:write).
Bearer token format: Authorization: Bearer ark_live_ent_Test keys use ark_test_ent_. Both are issued per entity
via Settings > Developers > API Keys.
Headers
Client-generated unique key for idempotent POST/PATCH/DELETE operations. Alias for the Idempotency parameter. Max 255 chars. On retry with the same key, the original response is returned without re-executing the operation. Keys expire after 24 hours.
255Path Parameters
Response
Voided label record
A shipping label purchased from a carrier (typically Shippo). One label per package. URLs expire 30 days after purchase; persist the PDF locally for long-term retention.
Carrier-hosted PDF URL (time-limited).
Arcus-archived PDF URL (permanent).
Amount Arcus paid the carrier.
Amount billed to the customer.

