This declaration by Alexandre Grothendieck, has been placed on the homepages of the Grothendieck Circle (in French), and Ferment Magazine (in English):
Declaration of my intention to refuse permission to allow my works to be published
I have no intention of publishing, or republishing, any work or text of which I am the author, in any form whatsoever, in electronic or print media, whether it be in the form of entire works or extracts, whether or not they be texts of a scientific or personal character, or any other kind, or in the form of personal letters addressed to others - as well as all translations of texts of which I am the author.
All editions or transmission of such texts which have been produced in the past without my express permission, or shall be made in the future as long as I am alive, which will or has been done in opposition to my will, as it is precisely expressed herein, will be deemed illegitimate in my eyes.
To the degree that I become aware of them, I will insist to the makers of these pirate editions, or any other publications including, without my express permission, texts from my own hand (apart from possible citations of a few lines at most), that they immediately withdraw these works from the marketplace; that the directors of libraries holding copies of my works, that these works be removed at once.
If my intentions as an author, as clearly expressed here, are treated as dead-letter, then let the shame of their contempt for me fall upon the heads of those responsible for those illegitimate editions, and on the directors of the libraries that harbor them. (From the moment that one or the other be informed of my intentions)
Made at my residence January 3, 2010 AG