Do Libraries no longer mark there discarded books as discarded?

I have received a few books that say property of such & such library.  They are not marked discarded.  There are no markings anywhere that they've been sold or donated or whatever.   It makes me wonder if some libraries are missing their books.

When I helped at the library we had to mark in red or stamp all books that where being discarded. 

Does anyone know?

Not all libraries stamp their discarded books.  Don't worry about it.

Some just draw a line through the barcode the library uses. If they even do that.

I wouldn't worry too much about it. In most cases, having to pay for a book replacement for a 'lost' book will be well over the price of a credit. So I don't see it happening often.

I just went to a library branch closing giveaway.  They gave away thousands of books and none of them were marked discarded or a line through the barcode.  If you didn't know they closed the branch, you would think it was still an active library book.

This could be helpful, from the help center:

If you receive an ex-library book that is not clearly marked "withdrawn" (not all libraries do this), you should contact the library to ask them if this book is still part of their collection.

• If the book is still part of the library's active collection, you should contact us.

Thanks that will make me feel better.  I have received many others that are marked discarded.  I wish it was still a rule that they all followed so it would make ya wonder.

My library just has a line through the barcode. Takes alot more time to stamp books for selling on the FOL tables. 
See if the library has an online catalog, look up the title and see if they list the barcode on the website.. Quick and easy way to check.

Almost all of the ex-lib books I trade here are from one library that puts the line through their barcode to indicate its been withdrawn. The problem is that if  I can remove the stuff stuck to the book without damaging it I will. That will usually leave a paperback with the library stamps on the edges of the book, but without the cancelled bar code to show it was withdrawn.

I've contacted a library twice about books I received from PBS, and both times they'd been taken out of circulation.  But, I do think if it isn't noted, you should double check.

My buddy sent a book in much the same condition as described here, presumed to be withdrawn despite a lack of any indication to that effect.  The member who requested it checked with the library and the book had in fact NOT been withdrawn at all.  He had his account frozen so PBS could make sure he wasn't just checking books out at the library and posting them into the system.  If you're not sure, CHECK, it's worth the phone call to avoid the consequences.

This is one of several reasons why I will not request ex-library books. :-(

There are quite a few Friends of the Library book stores around here that sell decirculated books along with donations.

Most of them are marked, but I have also seen quite a few that aren't. I have yet to see anyone double check or even comment as they are purchased. I figure if the staff at the FOL stores are already certain that they are decirculated, I don't really need to be double-checking them all after I get home

I honestly never worry about it.   I've yet to contact a library for a book not being marked withdrawn.  If someone did check out a library book and post it here instead of returning it, it's the responsibility of the original person to pay the fee to replace the book, and not mine. 

Probably half the books on my current shelf are books I bought at the twice-yearly FOL sale at my local library. Most of them have a line through the barcode, some have a withdrawn stamp, but not all of them...and they are all from the same library system! If there is that much variation within the same library system, imagine the differences between different libraries!

Cheryl