I. Internal Verification & Certificate of Authenticity
All lots are verified for authenticity to be original by our internal specialists. Upon completion of your acquisition, you will receive a formal De Middel Certificate of Authenticity.

This certificate guarantees the item’s origin and identity as represented on our website, providing peace of mind with every acquisition.

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II. Bespoke Third-Party Authentication Service

For clients requiring the highest level of independent assurance, we offer a dedicated service to coordinate external, third-party authentication:

Expert Partners: We work with reputable, recognized third-party authenticators worldwide, but are also happy to work with the client’s counterparty of choice to manage the verification process.

Process: We handle all logistics, correspondence, and submission of the object to the external expert.

Fees Structure: The total cost for this service will depend on the object (e.g., size, medium, and required expert). De Middel will charge the client the actual cost of the third-party expert’s fee.

Service Charge: De Middel will charge a 10% service fee to cover the administration, logistics, and handling of this specialized service, with a minimum charge of £50 per item. This fee is separate from the third-party expert’s valuation fee.