Originally Posted by
ac777
AC books the Business class on C and on transpacific flights does not want to give COS bonuses. Other airlines have no problems with it. So be careful on the Transpacific sectors.
This would of course only be true if you are crediting the miles to AP - the OP did not specify what program he belongs to - and only if they are giving you a hard time, as you explained in the AC Aeroplan forum, usually it should be alright.