Get a Knoller Certificate of Authenticity for your painting (COA) for your Knoller drawing.

For all your Knoller artworks you need a Certificate of Authenticity (COA) in order to sell, to insure or to donate for a tax deduction.

Getting a Knoller Certificate of Authenticity (COA) is easy. Just send us photos and dimensions and tell us what you know about the origin or history of your Knoller painting or drawing.

If you want to sell your Knoller painting or drawing use our selling services. We offer Knoller selling help, selling advice, private treaty sales and full brokerage.

We have been authenticating Knoller and issuing certificates of authenticity since 2002. We are recognized Knoller experts and Knoller certified appraisers. We issue COAs and appraisals for all Knoller artworks.

Our Knoller paintings and drawings authentications are accepted and respected worldwide.

Each COA is backed by in-depth research and analysis authentication reports.

The Knoller certificates of authenticity we issue are based on solid, reliable and fully referenced art investigations, authentication research, analytical work and forensic studies.

We are available to examine your Knoller painting or drawing anywhere in the world.

You will generally receive your certificates of authenticity and authentication report within two weeks. Some complicated cases with difficult to research Knoller paintings or drawings take longer.

Our clients include Knoller collectors, investors, tax authorities, insurance adjusters, appraisers, valuers, auctioneers, Federal agencies and many law firms.

We perform Martin Knoller art authentication, appraisal, certificates of authenticity (COA), analysis, research, scientific tests, full art authentications. We will help you sell your Martin Knoller or we will sell it for you.

Martin Knoller was an 18th century Austrian painter. Knoller mainly painted portraits and genre scenes.

Still wondering about an 18th century Austrian painting in your family collection? Contact us…it could be by Martin Knoller.