I'm curious to know who gets the message you send when you click on "I Cannot Mail This Book". I had to explain why I couldn't mail a book recently and wondered where the message ends up.  Does PBS get the message for my 'file' here, or does the requester see the message? Or somewhere else?

I think it gets sent to the requestor as a PM message like when a book is marked RWP.  It also stays on your account record I assume so if someone is constantly cancelling book requests they can see that.

You get an e-mail message from TPTB  (Subject:  Cannot Mail (Requestor Conditions) and then the name of the book) which states that the book can't be sent because of your requestor conditions.  Then if the member who's turned you down puts a message in as to why they can't send the book it's posted below that.   Pat

It depends. Yes, if you have an RC you will see the message but I believe that if you don't have an RC, you will only get an email and see the reason if it is the only book of that title posted in the system. If there are other copies, posted in the system, your offer is automatically sent to the next person who has the book and you don't get any email at all.  In all cases where you cannot send a book, PBS keepsthe reasons in your file to look at in case there is a pattern of uncompleted transactions.

Thanks for the input everyone. Twice I've not been able to fulfill a request for a wish list book so I worded the reason why I couldn't as if I was writing to the member who wanted the book - so they would know there was a very valid reason why the book couldn't be sent, so now I'm pretty sure they are receiving my note. Not they expected a lengthy discourse on how clumsy I am, but I also didn't want them to just get a curt "sorry can't sent it".  After 6 months here I'm still learning new things.