Expertizing and authentication are essential in today’s stamp market, where many stamps carry significant value. While collectors may trust dealers or auction sources, valuable stamps should still be carefully examined for faults, repairs, reperforations, or alterations. True expertizing goes far beyond identifying shades and varieties—it requires years of experience and advanced forensic tools to detect sophisticated repairs and changes that traditional methods often miss.
That’s why collectors should consider having important items certified by PSAG. Certification helps protect your investment, provides confidence in authenticity, and can significantly increase buyer trust and resale value when it comes time to sell a collection.
Meet our experts below.
Philatelic Stamp Authentication and Grading, Inc.
Expert Committee
- Over 1700 cumulative years of experience
- Winners of over 125 National and International GOLD medals for their exhibits
- Authored over 400 Articles and Books
Teela Pongpakdee
19th/20th Centuries US up to 1930, Shades, and Grills
L. Bustillo
19/20th Century US, B-O-B, 5c 1856-60
Richard Drews
19th Century US, Shades, Grills
Ken Srail
19th/20th Centuries US, Shades, Grills
Richard Doporto
1c & 12c 1851 - 57
10c 1855 - 1859
Plating
Elliot Omiya
3c 1851-57 Plating
Robert Lampert
3c 1851-57 Shades & Plating
Charles Temple
3c 1851-57 Shades & Plating
Don Tocher
Plating 1851-56
Steven Rosen
19th Century US and Plating
James A. Allen
3c 1851-57 Shades & Plating
Richard Friedberg
Revenues
Eric Jackson
Revenues, Ducks, US. Telegraphs, Carriers & Local Post Stamps, Post Office Seals, Saving Stamps, US Possessions
Dan Harding
1st Issue Revenues
Ron Lesher
Tax Revenues
Mike Morrissey
Revenues
Robert Rufe
Special Handling Stamps and covers
Clifford J. Alexander
Locals & Carrier Stamps
John D. Bowman
Locals & Carrier Stamps
John L. Larson
Test' Stamps
James E. Lee
Proofs & Essays
John Hotchner
EFOs in the Expert Committee List
Doc M. Pepper
United States Newspaper Stamps
Harry G. Brittain
US Color Varieties
James Bardo
Contemporary U.S.
Allen C. Hofsetz
Private Vending Coils
Jerry Palazolo
Confederate States of America
Leonard Hartman
Stones on Confederate
Philip Stevens
Envelopes & Postal Cards
Douglas Weisz
Envelopes & Postal Cards
Lewis Bussey
R.F. Overprints & U.S. Postal Cards
Richard C. Frajola
US 19th Century Covers
Tom Jacks
Booklet Panes
Tom Corette
2c 1893 Columbian
Don Medcalf
Hawaii
Brian Medcalf
Hawaii
Allen Furikawa
Hawaii
Lori Penitani
Hawaii
Mathias W. Benward
Guam Guard Mail
Len McMaster
Philippines
Don Peterson
Philippines Islands (Spanish Administration)
Craig Eggleston
Philippines
Gary B. Weiss
Canal Zone
Bruce Hecht
Canal Zone
Ariel Hasid
Canada
Ken Srail
Canada
Ernesto Cuesta
Cuban Stamps & Postal History
Patricia Kaufmann
Confederate States of America
Stephen Ferrell
Duck Hunting & Permit Stamps
Matthew Kewriga
Fancy Cancels
Randy Armstrong
US, Peru, Grills, Hawaii
Thomas Libby
Italy, Switzerland
Gregory Knight
Ducks
Steven Unkrich
The Washington-Franklin Series