Authentication
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Works include Picasso and Van Gogh, but many are yet to be authenticated
Experts have been silenced by fears of legal action if doubts regarding the sculptures' legitimacy are voiced
Competing claims and potential conflicts of interests delay publication, originally scheduled for 2006
The case set a legal precedent about the legal duty of authenticating bodies
The works were set to be displayed at a now cancelled authentication debate
Policy decrees that works determined to be fake must be handed over to the authorities so that they cannot re-enter the market
Cristiano Lovatelli Ravarino's collection of drawings has been a hot topic in the art world
While some fear the negative effects of the closure of the vetting board, others say its role was not essential
Growing concerns over authenticity of Modigliani portrait on show in Moscow museum
Joe Simon-Whelan spent three years trying to prove authenticity of a painting depicting the artist himself
Simon-Whelan says he lacks the financial resources to pursue his case
Authentication board says famous museum director “falsified” their history
Judge says he does not have power over Calder Foundation
Collector says a signed work from the same series confirms his work is genuine
Artist’s widow in marathon authentication exercise
Michael Werner, his dealer for 30 years, says “everything was out of control” before the artist died
Former Factory assistant claims he made the disputed work
Case seeks to punish defendant for selling works found in trash
Complaint says work could lose $3m in value as a result
Movie producer Joe Simon-Whelan sues, believing his work is genuine
Court to rule on payment “held in trust”
A source close to the Andy Warhol Authentication Board hints at a change of heart
Allegations circulate that curator Pontus Hultén created unauthorised replicas
Culture ministry responds to fakes certified by leading institutions
Alan Yentob shines a revealing light on the secretive world of the Warhol Authentication Board
The works depict the 1930s Spanish Civil War
The Warhol Foundation adds curatorial experts to attempt to ease the controversy surrounding its authentication board