Originally Posted by TheSFReader
Oops, sorry, hadn't seen that question.
Yes, the kind of marking done by Immateriel (Bragelonne's distributor) states (openly and visibly) at each chapter's start and end, to which customer (by email) it was sold.
That marking can be "erased", but nobody does it.
I don't know about any markings. I can't see anyone in the watermarked epubs that I have bought.
I suppose that the marking that show that I have bought the books is encrypted in the books.
I have out of curiosity tried to find my credentials in one of the books I bought. To no availl, and that is certainly very fine with me.