As with coins and baseball cards, in recent years some stamp collectors have started submitting their stamps to grading agencies for "expertising". Some of the well-known organizations which issue certs for stamps include PSE, Weiss, PF and APS.

Some stamps will be sold with an existing cert, and other sellers will offer the buyer the opportunity to have a stamp graded and examined by a third party before completing the transaction. As with any collecting purchase, cert or not, caveat emptor!


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U.s. #1 Used Pair W/cert - 1847 5c Red Brown ($900)Nystamps Us Newspaper Stamp # Pr75 Mint Og H $850 CertificateNoblespirit No Reserve Superb U.s. 459 Mint Nlh Pair = $600 Cv With Pf CertU.s. #456 Scarce Mint W/cert - 3c Violet, Rotary Coil ($225)Us Stamp:#385 1c Green 1910 12p. Mnh/og Stamp $240 + Certificate Mint Stock With $5 Columbian #245 Trans To 8c With Cert Nh Cat $17285Nystamps Us Duck Stamp # Rw3 Mint Og Nh $350 CertificateUs Stamp:#csa2 10c Blue 1861-62 Confederate State Stamp + CertificateUs Stamp:#e9 10c 1914 Special Delivery Mnh/og Stamp + CertificateUs #315 Imperf 5c -- Nh Pair With Pf CertUs 62b Used With CertUs #9 Used -- Beautiful -- Position 6l1l With Pf CertUs #243 Columbian $3.00 -- Mint H -- Xf 90 Pf Cert BeautifulUs #122 Used -- 90c Pictorial 1869, With CertificateUsa Certificate Exchange Early Revenues Lot(approx 70 Stamps)g11327U.s. #369 Rare Plate Block W/cert - 1909 2c Lincoln Bluish ($2,750)Ckstamps: Us Stamp Collection Scott#66tc 3c Washington Unused Ng Weiss CertMr Fancy Cancel 216 Unused Regummed Block Of Four Vf Appearing Pf Cert Cv$1050Salem Railroad Of Nj 1863 Civil War Era Stock Certificate W/ R44a Revenue StampUs #42 (5c Orange Brown, Reprint) - No Gum As Issued, Pse CertUs #56 (3c Brown Rose, First Design) - Og Hinged, Pf CertUs #138 Used -- 7c Vermillion, H Grill, Nyfm Cancel, With CertUs Stamp:#567 20c Carmine 1922-25 Flat Plate 11p. Mnh/og Stamp + CertificateU.s. #544 Rare Used W/cert - 1c Green, P111916 Aurora Mining Co.,nevada/signed President Weldon Stock Certificate/stampsUs Stamp:#lo5 1c Blue 1875 Eagle Carrier's Stamp Unused + Certificate Usa Early Revenues Bank Check Certificate Lot(appx 100 Stamps)g11326Us 392 Line Pair Mnh -- Pse 80 Graded CertUs Stamp:#r24a 5c Certificate 1862-71 Revenue Imperf Stamp Pair $35Us #138a Used -- 7c Vermillion, I Grill, Nyfm Cancel, With CertUsa Early Revenues Exchange Certificate(approx 90+stamps)g11325Us# 35 (10c Green, Ty. V). Original Gum, Lightly Hinged, With Pf Cert.Used 1862 Us 24c Lilac Scott #78 Fancy Circle Of V's Cork Cancel W/ CertificateUs #119 Used -- 15c Pictorial 1869 Type 2, Pf CertificateScott #291 Mint 1898 Gold Prospector Pf Certificate Cv $600.00Nystamps Us Postage Due Stamp # J41 Mint Og H $110 CertificateThirteen Us Revenue Certificate Stamps - UsedM1072- 1869 Pictoral Stamp Scott # 122 Ng W/2015 Apex Certificate286, Mint 2¢ Superb Og Nh Gem! With Pse Certificate - Stuart Katz1923 Us War Savings Certificate With $5 Dollar StampNystamps Us Duck Stamp # Rw43 Mint Og Nh $18 Certificate Pse Xf Sup 95Nystamps Us Duck Stamp # Rw44 Mint Og Nh $18 Certificate Pse Xf90Q170- Newspaper/periodical Stamp Scott # Pr67 W/ 2011 Weiss CertBeller Hand Drawn Hand Painted : 20th Century Trains W/ Beller Certificate Incl.Usa Old Revenues Bank Check Agreement Certificate(apprx 65 Stamps)g11324Usa Early Revenues Certificate Poa Exchange Lot(approx 65+stamps)g11707Houston Oil Company Of Texas 100 Share Revenue Stock Transfer Certificate(g11579Q556- Scott # 94 With Double F-grill, W/ 2003 Apex Cert, CreasesDr Jim Stamps Old Us Revenue Scott R33 10c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Unused No Gum No ReserveDr Jim Stamps Old Us Revenue Scott R33 10c Certificate Used Thin No ReserveDr Jim Stamps Old Us Revenue Scott R44b 25c Certificate Used No Reserve#1674 Mnh Pse Graded 98, Certificate # 01256412Dr Jim Stamps Old Us Revenue Scott R24 5c Certificate Used No ReserveUs #611 Used, Grade 95 With Pse Cert. Pse - Smq Value At 95 Is $25Dr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used Blue Cancel