The Fondation Oskar Kokoschka will treat as confidential any questions submitted to it regarding the authenticity of works by Oskar Kokoschka, and will refer them to the relevant specialists. Clarifications based on a photographic examination are free of charge; a fee will be payable for any more in-depth study required. The paintings of Oskar Kokoschka are listed in the online catalogue raisonné of the paintings (available on this site); the works on paper are reproduced in the catalogue raisonné by Alfred Weidinger and Alice Strobl, Kokoschka. Die Zeichnungen und Aquarelle, 1897–1916, Salzburg: Verlag Galerie Welz, 2008 (further volumes to follow).
Please send all requests, together with the complete caption, provenance history and professional-quality, high-resolution photographs (front and reverse) to: