Art Expertise & Authentication
Patrick Offenstadt, certified SFEP expert — Reference authority for authentication and reasoned catalogues of 19th and 20th century masters.
Patrick Offenstadt
Certified SFEP Art Expert · Author of Benchmark Catalogues Raisonnés
19th & 20th Century Masters Specialist · President of the Gen Paul Committee
Recognized art expert and full member of the French Union of Professional Experts in Works of Art (SFEP), Patrick Offenstadt devotes more than 30 years of research to the authentication, inventory and valorization of modern masters. Author of the Catalogue Raisonné Jean Béraud (1849–1935) published by Éditions Wildenstein Institute and Taschen — undisputed world reference —, he chairs the Gen Paul Official Committee and leads the work of the reasoned catalogues of Albert Dubois-Pillet and Henri-Edmond Cross. He assists collectors, estates, foundations and museum institutions.
Frequently Asked Questions · Art Expertise
Everything you need to know about art appraisal, examination criteria, legal standing of certificates, and Catalogue Raisonné inclusion.
What is the legal standing of an SFEP expert certificate?
The SFEP is the premier professional appraisal syndicate in France. The issued certificate engages the civil and criminal liability of the expert for 30 years. It is recognized by all major international auction houses, banking institutions, courts, and insurance underwriters.
How long does an artwork examination take?
An initial assessment based on photographs is generally delivered within 48 to 72 hours. If the artwork requires in-person physical inspection, frame disassembly, or archival investigation, the timeframe typically ranges between 1 and 3 weeks.
What photos should I provide for an initial review?
To allow an accurate preliminary review, we recommend providing: a sharp overall photo of the front under natural light, a close-up of the signature, a photo of the reverse (back of canvas or panel), and pictures of any labels, customs stamps, or inscriptions.
How to include an artwork in a Catalogue Raisonné?
When an artwork by Jean Béraud, Albert Dubois-Pillet, Henri-Edmond Cross, or Gen Paul is authenticated after examination, it receives an official archive number and is registered in the Catalogue Raisonné database for publication in upcoming volumes and supplements.
Request an Expertise or Certificate
Fill in the information regarding your artwork. Patrick Offenstadt will get back to you promptly with an initial confidential review.