Recently I mailed the book the Loch by Steve Alten and was unable to mark the book as mailed due to being out of town during the heat wave without internet, the person that requested the book has recived it in the mail, I was wondering if someone could manualy credit my account for it?

For you to get the credit, the receiver needs to go to their transaction archive, find the book, and mark it received.  However, they're not required to do it.

From the Help Center:

If a book is not marked mailed by the deadline, it will cancel automatically, and the request will be passed along to another member offering a copy of the same book.  

• If you act fast, you may be able to "catch" the requestor before the second sender prints the address to send the second copy of the book.
• If the requestor can still cancel the new request, then he or she will not end up with 2 copies, and will probably be happy to mark your book received from her Transaction Archive when your copy arrives.
  • She can do this following the instructions in I received a book from a canceled transaction!

• If she marks your book received from the canceled transaction, you will get credit for having sent the book.

• If the requestor gets two copies of the book, she is not obligated to mark your canceled one received (she IS obligated to mark the properly sent book received from her active transactions), so you should contact her as soon as possible following the instructions below.

To try to get credit for sending the book: you should contact the requestor as soon as possible using the Personal Message system.

• To contact the requestor, click the button on the canceled transaction for this book.
  • Your canceled transactions are in your Transaction Archive.
  • To get to your Transaction Archive, place your cursor over My Account in the toolbar at the top of the site, and click "Transaction Archive" in the menu that drops down.
  • Scroll down the list to see the transaction for this book.  To be sure you have the correct canceled transaction:
    • mouse over the icon at the left to be sure that the popup box says "No response from sender"
    • compare the date of cancellation to the date you got the cancellation email from PBS
  • Click on the transaction when you have verified it is the correct one.
    • Write a message explaining the situation.  It is important to be clear!  Saying only "Book was mailed" will not help matters.
    • This is our suggested text (of course you can modify it to suit your situation) for your PM:

"I mailed this book [Insert title of book] but forgot to mark it mailed before the deadline, and it was canceled. If you have an active request on your account page for [Insert title of book] it is not with me--it is with a new sender. Your request must have been passed on to that person, and you will get 2 copies of this book if the new request is not canceled. If you do have an active request on your account page for this book can you cancel it? You will be getting a copy of the book from me. You can then mark my book received when it arrives, from your Transaction Archive. If you are willing to do this I really appreciate it! Just let me know if you have a new transaction on your account page, and if you are able/willing to cancel. I am very sorry about the inconvenience. I am going to mark my books mailed before the deadline from now on!"

• If the requestor is able to cancel the new request (or has no new request), and marks your book received from the canceled transaction when she gets your copy, you will get credit for having sent it.

  • The requestor can mark your copy received from the canceled transaction in her Transaction Archive only if you printed the address from this transaction before it was canceled.
    • Again, she can do this following the instructions in I received a book from a canceled transaction!
  • If you clicked "Cancel Order" on the transaction by mistake (for example, if you declined this book as part of a bulk request in error and printed the address from the active transaction that was left and sent the book anyway, or if you obtained the requestor's address in a Personal Message or email), there will be no "Was Book Received?" button on the canceled transaction in her Transaction Archive.
    • If this is the case, then she can "buddy" you a credit following the instructions in How do I give credits to other members?.

Additional Notes

• If your transaction was canceled because you mailed the book and then went out of town:
  • Remember, the SENDER sets the deadline, when choosing the mail-by date.
  • You should keep in mind your personal schedule, postal holidays and the like when choosing your mail-by date.
  • If you plan to mail a book on the way out of town, mark it mailed the morning or the night before you mail it: this is perfectly okay to do.
    • A book should be mailed within 24-48 hours of marking it mailed.
• If your computer or Internet connection failed after mailing the book, and you were unable to log in to mark the book mailed:
  • Any Internet-equipped computer (library, a friend's) can access PaperBackSwap.
  • If you have an unreliable Internet connection and no access to another computer, you might make a habit of marking the book mailed just before you mail it; this is perfectly okay
    • A book should be mailed within 24-48 hours of marking it mailed.
    • If you always mark your book mailed just before you mail it and your computer/internet crashes, you will not already have mailed the book and be unable to mark it mailed.
    • If your computer/Internet crashes and the deadline passes while you are unable to get Internet access, the transaction will cancel; you will not have mailed the book in this case.  Simply repost the book when you have Internet/computer access again.

• If you made arrangements with the requestor to mail the book later than the mail-by date you chose when accepting the book:
  • Remember that the PBS computer will not know of these arrangements
  • The PBS system will not adjust your deadline to mark the book mailed based on alternate arrangements you have made in PMs.
  • You will need to mark the book mailed before the deadline--even if you haven't mailed it!--to keep the transaction from canceling.
  • Marking a book mailed more than a day or two before you mail it is ONLY acceptable if you have gotten the requestor's permission to mail the book later.

That happened to me a  while ago. I pm'd the requestor and asked them to request the book from my shelf again. Then they could mark the book recieved and I got my credit.

The other way would be if they wanted to they could buddy you a credit for the book.