Originally Posted by A2A

Any reward tickets cancellation leads to the points going back to the account in the same sequence they came in [FIFO in digital parlance]. so for instance if you booked a ticket with June 2011 expiring miles for travel in december 2011, and cancel in nov 2011 due to whatever reasons, the block of miles expiring in june 2011 will not be credited. the t&c very clearly state that!