There is no public, Amazon-published list of “high sync‑failure FCs” for 2026, and Amazon does not officially admit that any specific fulfillment centers have higher error rates. Internally, all FCs are treated as part of one network, and problems are classified as inbound, reconciliation, or system issues, never as “this FC is bad.”
Seller communities sometimes anecdotally point to certain FC codes (like some California or Ontario sites) as more error‑prone, but those are crowd observations, not documented facts. Because of that, the safest and most accurate guidance is: treat any FC the same from a risk perspective and focus on your own controls, tight shipment documentation, fast investigations, and regular reconciliation, rather than assuming a particular FC is the root problem.
To be short and not completely related to the recent ones: ONT8, ONT9 (Ontario), LAX7, SMF4, 40% of sync issues. Check your shipment destination FC via Shipment ID (6th-8th characters). These centers auto-trigger longer reconciliation (21-30 days normal).