I received a book today that said "Advance Uncorrected Galleys - Not For Sale" at the bottom of the front cover.  Unfortunately for me, I didn't realize this before I had already marked the book received in good condition and even sent her a thanks. At this point I know I'm out of luck in even trying to get my credit back, it's a lesson learned for me to really pay attention before I mark anything received. 

My question is, should I send her a message warning her that it's against the rules to send ARCs, or should I just let it go? If you sent her a message, how would you word it? I wouldn't be asking for my credit back, I just want to make it known that it's not allowed in the most polite way. What would you do? 

Yes, a polite note with Help Document references wouldn't be out of place.  It's surprising how many members don't know what an ARC is or that they are not allowed.  If it was an honest error you would be helping a fellow PBS member.  If it was intentional you might get a snarky reply, if so you can report it to PBS admin.

yep, what Denise said.  sometimes it's not about getting your credit back, but feeling you at least informed the sender of their faux pas. (ARCs seem to be one of those things some members just don't notice!)

Some ARCs are pretty well disguised, with color covers that have the same illustration, etc., as the final book.  (I've bought a few in the local thrift shop that I didn't notice were ARCs until I got home.)  But, yes, at least a helpful (friendly) note would be nice ("I just noticed the book you sent was an Advance Reading Copy.  You probably did not realize these are not allowed to be posted on PBBS; I'm just mentioning it in case you have others you should de-list.  You can offer them in the Book Bazaar, though.")

Somebody already pointed it out but not all new members are "book smart". I had no idea what an ARC was when I first joined. 

I struggle with how to phrase correspondence sometimes too. I think I'd probably say something like this. Feel free to use it verbatim if you like

Just a friendly note: I didn't notice until I had marked the book received that is is an ARC, so I understand how you missed it too. If you aren't already aware ARC's are not postable. I'm not asking for a credit back, just wanted to share something you might need to know.

Nancy - I don't want to put the details here but if you'd like to include what the guidelines say about ARCs this link will help you get there.

Click Here 

Thank you for all the replies. Yes, I think I'm going to send her a note about it, probably something very similar to what Evelyn and Nancy D wrote. Thanks again! :)

Somebody already pointed it out but not all new members are "book smart". I had no idea what an ARC was when I first joined

I didn't either.