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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Scott Rb8a - Used, Cv $1,000, Weiss Certificate!Scott R112b - Strip Of 4 With Original Gum, Sewing Machine Perf - Pf Cert!Canal Zone #1 Scarce Mint W/cert - 1904 2c Rose, Map ($650)Scott R57a Horizontal Pair, Red Handstamp Cancel, Huge Margins, Pf Cert!Usa Scott #1 "dot In S" 5c + Cover Dated Charleston 1847. Pf CertificateScott R100c - Used With Perfect Centering - Gorgeous, W/ Weiss Cert!Nystamps Us Official Stamp # O101 Mint Og H W/ Cert Paid $3101909 E6 Special Delivery On Cover With 332a And 337 Boston To Chicago, Pf Cert!Scott R128 - Used With Perfect Centering - W/ Pf Certificate!Scott R88a - Jumbo Margins, Neat Manuscript Cancel - Pf Cert!U.s. #139 Rare Mint W/cert - 10c Brown W/ Grill ($7,000)U.s. #85b Scarce Used W/cert - 2c Black W/ "z" Grill ($1,200)1903 E5 And 301c Booklet Pair (rare) On Corner Card Cover To Wash, Dc, Pf Cert!U.s. #330 Mint Vf Nh Beauty W/cert - 1907 5c Jamestown ($290)Noblespirit No Reserve (us1) Crisp Us 230 & 237 On Cover W Cert = $250 CvU.s. #396 Unused Line Pair W/cert - 5c Blue, P8.5 Coil ($425)Guam #e1 Mint W/cert - 1899 10c Special Delivery ($150)#c33 Mnh Pse Graded 90, Pse Certificate # 013243541909 E7 Special Delivery On Canada Stationery Cover To St. Paul, Minn, Pf Cert!Noblespirit No Reserve (us1) Stunning Us 232 Columbian On Cover W Cert = $35 CvNoblespirit No Reserve (us1) Vibrant Us 233 + U348 On Cover W Cert = $275 CvScott R25b Pair With Red Adams Express Co. Handstamp, Pf Cert!Dr Jim Stamps Old Us Revenue Scott R8 2c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R7 2c Certificate Used No Reserve1952 George Washington Combo Fdc On 1957 $1.00 Silver Certificate - Both SidesUnited States, Scott No. 20lu14, Used, Genuine, Rough Margins. CertificateUs 1957 $1 Star Note Silver Certificate Graded Pcgs 67ppqUs Stamp 915 1943 France Overrun Mint Ognh Pse Cert Graded Xf Sup 98Us Stamp 915 1943 France Overrun Mint Ognh Pse Cert Graded Xf Sup 98Us Stamp 915 1943 France Overrun Mint Ognh Pse Cert Graded Xf Sup 98Mr Fancy Cancel Scott 634a Used 2c Block 4 Cert Light Crease Upper Rt Stamp War Savings Certificate Series Of 1919Us Stamp 915 1943 France Overrun Mint Ognh Pse Cert Graded Xf Sup 98Dr Jim Stamps Old Us Revenue Scott R24 5c Certificate Unused No Gum No ReserveDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No Reserve1911 E8 Cover With Top Frame Line Missing Variety On Cover With 374a, Pf Cert!Tdstamps: Us Stamp Scott#339 13c Washington Mint Lh Og Photocopy Pf Cert1903 E6 And 301c Single (rare) On Mining Corner Card Cover To Niles, Il, Pf CertScott R40f, First Issue Double Impression, Blue Handstamp Cancel And Pf Cert!1907 E6, 319g Special Delivery San Fran, S. Jose And Los Ang Rpo Cover, Pf Cert!