John Castagno's Professional Services

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Research of Your Artist or Artist's Signature


John's Biography | ArtNews Magazine Article

The following is a listing of fees charged for various situations:

Please Note: The fee reserves up to four hours of Castagno's Professional Services team working on your inquery, not all signatures can be deciphered.

1. $125 USD for deciphering a signature, which includes full artist's name and birth date, and what reference information I may have on hand in my library of databases. Purchase
2. $150 USD per painting per appraisal. This service provides an appraisal listing the artist's name, nationality, birth and death dates, description of the artwork and value. Purchase


* All inquiries should be sent to

Thank you for your interest in

Payments Online

Go to our Signup/Purchase Page to pay for the service you want. Once your payment is processed, John's team will contact you through email for further details on the research you need performed.

Payments Through Mail

Checks should be made out to “, LLC” and mailed to:, LLC
1516 N 5th Street. Suite 304
Philadelphia, PA 19122

Please indicate which service you want and include any information we might need to perform this research. Please also include your name and return mailing address as well as the name or company to which refunds should be issued.