Overview

When a seller repeatedly cancels orders for the same product, Amazon flags the activity with Error 18940 and automatically pauses the affected listing. The pause protects buyers from a poor buying experience, but it also stops sales until the seller corrects the underlying issue. Prompt remediation is essential to keep the product visible and maintain healthy account metrics.

Key Points

• Automatic listing pause — Amazon suspends the offer as soon as it detects a pattern of cancellations on a single ASIN, preventing any further purchases until the problem is fixed.
• Cancellation‑rate threshold breached — The platform maintains a per‑product cancellation ceiling; exceeding that limit on an individual listing triggers Error 18940, even if the seller’s overall account rate remains acceptable.
• Inventory mismatch is the primary cause — Repeated cancellations usually mean the seller listed more units than are actually on hand, signaling a discrepancy between the catalog and real stock.
• Manual re‑activation required — Unlike temporary holds that lift automatically, this error obliges the seller to verify the listing details and reactivate it through Seller Central.
• Account‑health implications — A high cancellation frequency on any ASIN can spill over into broader performance metrics, potentially prompting warnings or suspension if left unchecked.

How to Resolve Error 18940

1. Audit current stock — Open the Inventory > Manage Inventory page, locate the paused ASIN, and compare the “Available” quantity with your physical count.

   • Example: If the dashboard shows 12 units but you only have 4 in the warehouse, adjust the quantity to 4 or to zero if you cannot fulfill any orders.

2. Update the quantity field — Edit the listed quantity to match the verified count. If the product is out of stock, set the value to “0” rather than leaving a misleading number.

   • Example: Changing the quantity from 12 to 0 stops Amazon from offering the item while you restock, eliminating further cancellations.