Today I received an ARC in the mail from a book granted from my wishlist.  I requested a credit return from the sender since I cannot post it to the system after I read it.  The sender replied and said she would refund my credit, but she would like the book back too.  I'm confused, is that how it works?  I send it back to receive my credit?  That doesn't make sense because I would be paying postage to get my initial credit back.  Do I ask her for two credits?  1 for my initial credit another for return postage?  Please help, I've swapped a ton of books and this is the first issue I've had.  I just don't know how to respond know because I don't know the appropriate action to take. 

Thanks in advance to anyone who can help me!

You do NOT have to send it back but if you choose to do so, the other member needs to give you the postage to do so.  They can send you the money somehow, but typically, they'll send a credit to cover the postage.

You can send them this from the Help Center:

Remember that the requestor is not required to send a problem book back at his or her expense.   The sender of a problem book does risk losing credit, book and postage; this is the incentive not to send problem books. 

• If you want a problem book back you can provide a stamped, self-addressed envelope to the requestor by snail mail (or you can give the requestor an extra Book Credit to compensate for postage, if both of you agree on that).
• Refund and postage compensation must be completed first - before the requestor returns the book (= it is not OK to wait to refund credit until getting a problem book back in the mail, or to expect the requestor to send the book back before getting postage compensation as described above).

Thank you so much Rhonda, that's exactly what I did.  I copied and pasted that in my message and asked her to let me know what she'd rather do, send an additional credit or pre-paid envelope.  So, hopefully one of those ways will suite her.  I don't mind sending it back if she pays the cost. 

I really felt bad to request my credit , but I wasn't happy with an arc.  Some books I don't mind having an ARC of, especially if it's going to be a keeper.  Others I really do want a postable copy and this was just one of those books.  *sigh*

Don't feel bad Shannon, ARC's are not postable FIFO.  Even says so on that pop up window when members post books to swap..."My book is NOT an ARC, My book is in good condition...etc". 

It baffles my mind that people still think that they can slip one past somebody and send an ARC.  Don't they read the rules that this is not an acceptable practice.  I have a stack of ARC that I think someone would like but I am not going to post them.  I may post in the bizarre and offer a deal like 3 books for one credit.

She ended up sending me 2 credits to mail the book back to her.  I'm happy we resolved things so quickly, but what a pain in the butt to mail it back.  I hope this doesn't happen again.  And, I hope she doesn't re-post it in the FIFO.

Kay, I have a few ARCs too and always post them in the book bazaar.  But I generally avoid arcs, unless it's a book I REALLY want.  Some of them are just too hard to get rid of and I don't have the extra shelf space.

Thanks to everyone who posted advice, I appreciate it.

Don't forget to mark the transaction resolved.  :)