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Sorry for the copy and paste from the Help Center but they are more concise than my answer would be.
If you do not see the when you mark a book received, that means that you requested this book to be sent to an alternate address (not the address on your account).
If a book you requested to be sent to an alternate address is received with a problem:
Last Edited on: 9/8/08 4:07 PM ET - Total times edited: 1