Email me at or give me a call at 415.931.7875 to make an appointment if you have any questions about whether a COA is valid or not, or what types of information a valid COA should include. Related Topic: Art Provenance: What It Is and How to Verify ItĪre you an artist who wants to include COAs with your art? Are you a collector who has questions about a COA? I regularly consult on all aspects of COAs.
