Deny Fulfillment

Denies a pending fulfillment. Use this endpoint when a fulfillment cannot be completed as planned — for example, when items are unavailable at the distribution center or a pickup was not collected by the customer.

When to use: Call this endpoint before the fulfillment is confirmed or shipped, when you need to cancel or reject the fulfillment.

Considerations:

• Denying a fulfillment may trigger marketplace-specific cancellation workflows and buyer notifications.
• A denied fulfillment cannot be un-denied. Create a new fulfillment if the order still needs to be fulfilled.
• Only applicable to fulfillments in a deniable state; returns an error otherwise.