Originally Posted by
svgittins
Ah, what a sucker for punishment I am. I find myself trying to do an online checkin for Air China more than 3 years after my last post on the subject. Same result - but different error code (-40002 this time). Progress of some sort I suppose....
Could it be that they need to verify your documents, visa, and will not allow you to check in. When I fly US-China, UA will not allow me to check in online due to document checks.