Can I bring alcohol in my baggage? How about Duty-Free Allowance? Please check here. Related articles I can't sign in to the customer page. What should I do? I can not apply for "flight duty-free pre-order service." Can XX (product name) be purchased on board? Can I sign in with my AMC member account? I would like to change my order (make additional order etc.) through the In-flight Duty Free Pre-order Service, but am unable to do so. Why is this?