Overseas warehouses can shorten delivery times, but they also make stock, tax, returns and customer service information more complex. The dispatch location, estimated delivery time and returns policy shown on the website should reflect actual fulfilment capacity.
Product pages should not promise the same delivery time for every country. Delivery coverage should be maintained by market, warehouse and shipping method, then shown again before checkout.
Operations teams should also retain stock synchronisation times and escalation contacts, reducing the risk of a website showing an item as available after an overseas warehouse has run out.