I ordered a book in December which timed out after the lister said it would be sent, but never printed out the label.  Since there was no other book in the system the title went back on my wish list.  A few days later another was listed and I accepted.  It arrived last week.

Today the original book arrived with a hand printed label. 

So do I give the sender a credit? 

Strictly speaking, you don't have have to credit the original sender.

Relevant excerpt from Help Docs Below.

I received 2 copies of the same book!

These are the possibilities:

1. You submitted one request, and the first sender did not mark the book mailed, but did mail the book.

2. You submitted one request, and the first sender canceled it by mistake, but still mailed it.

3. You submitted two requests for the book, to two different senders

Scenario #1 (the most common scenario):

• You submit a request, which goes to Sender #1

• Sender #1 does not mark the book mailed before the deadline, but still mails the book.

• Then the request cancels and gets passed to Sender #2, who also sends the book.

• You end up with two copies.

  This situation (the requestor ending up with 2 copies of the book) is part of why marking a book mailed before the deadline is such an important part of the swapping process.

  The bottom line here: always mark your books mailed, so you don't become Sender #1!

Scenario #2:

• You submit a request, which goes to Sender #1

• Sender #1 clicks on the transaction by mistake after (or before) mailing the book.
• When she does that, the request cancels and gets passed to Sender #2, who also sends the book.

• You end up with two copies.

In both Scenarios #1 and #2: When you receive 2 copies for a book after submitting only one request, you are not obligated to give a credit for the extra (canceled) copy.  You are obligated to mark the properly sent copy received.

• When you mark the book received from the active transaction on your En Route to Me tab on your My Account page, Sender #2 will get credit. 

• Sender #2's transaction is the only active transaction for the book on your account page.
• The transaction with Sender #1 moved into your Transaction Archive when it was canceled, as a canceled transaction.

• You are not obligated to give a second credit for a canceled copy of a book when you submitted only one request
  • You are also not obligated to send the book back (although this is a nice thing to do if the sender is a new member).
  • You are obligated to mark the book received that is on your En Route to Me tab on My Account.

• If you do wish to give credit to Sender #1, you can mark that copy of the book received from the canceled transaction:
  • Go to  your Transaction Archive:
  • place your cursor over My Account in the toolbar at the top of the site
  • Click Transaction Archive in the menu that drops down
  • you can also click the link 'Transaction Archive" from the My Account page

• Scroll down to see the canceled transaction for this book.
  • Check the sender name and Details to be sure it is the correct transaction
  • There are sometimes several canceled transactions for one title

• Click on the transaction

• The usual Book Received screens will come up from there.
• When you mark a canceled book received, the credit is taken from your account and given to that sender.

• Again,  you do not have to mark the canceled copy received.
  • If you like, you may Post the extra copy of the book into the system for others to request.

Assuming that by "timed out", you mean that the sender didn't mark it mailed by the deadline (rather than that the book was declared "lost", then arrived later), I agree with Sophia.  You can mark it received if you choose to, thus giving her a creidt, but since the fact that she didn't mark it mailed caused you to receive 2 copies of a book, you don't have to mark it received and spend the extra credit.

Question:  if a book isn't marked 'mailed' is there a way to log it in received?  I thought the 'received' button appeared only after sender marks the book 'mailed'?

Denise - there will be Was this book Received? button on the book in the Transaction Archive as long as the label was printed(accessed). Which would have had to happen if the book makes it to you or they wouldn't have an address to send it. Once you hit that button you are taken to the normal receiving process. Just make sure to be marking the right book and sender when you do it from there.