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

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

Getting a Duplessis 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 Duplessis painting or drawing.

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

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

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

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

The Duplessis 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 Duplessis 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 Duplessis paintings or drawings take longer.

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

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

Joseph Sifrede Duplessis was a popular portrait painter among nobility, aristocrats, artists and musicians in the 18th century. He studied under Subleyras and received many portrait commissions during his lifetime. He was known for his myriad paintings of Benjamin Franklin, and painted the official portrait of Louis XVI in 1775 at Versailles.

Still wondering about an 18th century portrait in your family collection? Contact us… we are the Joseph Siffred Duplessis experts.