Quest rewards

Hey guys I think I'm just being paranoid but is it possible to hand in a quest and not get the "inventory full" message or the rewards?

I didn't get an "inventory full" message from one or two epics and I know for sure I didn't get the SP books and stuff.

So is it possible for that to happen or am I just going crazy?

You claimed to not have gotten the books, so doesn't that answer your question?