Frequently Asked Questions

FREQUENTLY ASKED QUESTIONS

We operate globally, with teams of experts, researchers, and forensic specialists stationed in key cities such as Amsterdam, Paris, London, and Washington.

  1. Submit high-resolution images of your artwork’s front, back, and signature.
  2. Include the artwork’s dimensions and provenance details.
  3. Also include provenance details.
  4. Receive a service quote after the initial evaluation.
  5. Proceed with payment.
  6. We conduct a scientific and historical analysis of the artwork.
  7. A comprehensive authentication report is provided upon completion.

Physical examinations are typically conducted after preliminary research, though early assessments can be arranged based on your needs.

Shipping is not required. We prioritize safer options, including:

  • High-resolution image analysis
  • Live video consultations
  • On-site evaluations
  • Local assessments
  • Material analysis
  • Dating techniques
  • Specialized photography
  • Forensic studies

Timelines vary based on complexity: Simple cases: a few days and Complex or disputed works: several weeks or months.

The COA is included at no additional cost as part of the final authentication report.

Preliminary consultations are free and detailed services start at $300, depending on scope.

No, upfront payment is required to ensure an impartial process.

No, post-sale payments are not accepted to maintain objectivity and integrity.

Yes, our authentication reports are recognized and respected by leading auction houses, meeting their rigorous standards.

We adhere to strict confidentiality practices, protecting the identities and sensitive information of all clients, including collectors, galleries, and institutions.

Years of Experience

With a wealth of knowledge in art history and authentication, we provide precise, dependable results that inspire trust and confidence in our clients.

Our Promise

We are dedicated to excellence, offering tailored solutions designed to address your specific needs with the utmost care and professionalism.

Our Philosophy

We go beyond delivering results, striving to support our clients' long-term success and impact in the art world.

Contact Us


We provide expert evaluations of Sisley paintings and drawings worldwide, prioritizing your comfort and security. Our team can assess your artwork at a location that suits you, including your home, office, bank, attorney’s office, restorer’s studio, art storage facility, hotel, yacht, or even during your travels aboard an airplane. If you're acquiring a Sisley piece, we can evaluate it on-site at galleries, auction houses, or other venues. Additionally, we collaborate with institutions, conducting assessments at government offices, law enforcement agencies, universities, libraries, financial institutions, museums, and religious organizations. For insurance and liability purposes, evaluations are not performed at our premises.


Email: info@sisleyexperts.com
Phone: +1 (332) 232-4170

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