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. #291 Scarce Mint Nh W/cert - 1898 50c Trans-mississippi ($1,800)Us Perf 15 Sc # 39 1857-61 90c Mint Og H W Pse Cert1875 United States 10 Cent Yellow Stamp Us #127 Pse Cert Unused Hinged RareDrbobstamps Us Scott #62b Rare Used Stamp W/2016 Pse Cert. 2017 Scv $1600Noblespirit No Reserve (th1) Us Confederate No. 5 Used Vf W/ Cert = $450 Cv Nystamps Us Cut Square Stamp # U505 Mint $375 CertificateDrbobstamps Us Scott #83 Scarce Used Stamp W/2016 Pse Cert. 2017 Scv $1100Drbobstamps Us Scott #449 Used Stamp W/clean 2001 Pf Cert. 2017 Scv $600U.s. #188 Used Xf W/cert - 10c Brown ($150)Drbobstamps Us Scott #2 Scarce Used Stamp W/2016 Pse Cert. 2017 Scv $825Drbobstamps Us Sc #bkc17 Rare Mnh Og Complete Booklet W/ Pse Cert. 2017 Scv $500Usa Scott #20 1ct Used Double Transfer Position 9r11 Doporto Cert Cv $305+Drbobstamps Us Scott #rw17 Mnh Og Stamp W/clean Pse Cert. 2017 Scv $140U.s. #e3 Mint Nh Beauty W/cert - 10c Orange, Messenger ($675)Hawaii, 6c Kahului Rr, Genuine Used, With Hps Cert. HawaiianU.s. #188 Unused W/cert - 10c Brown ($625)Drbobstamps Us Scott #191 Mint Hinged Og Vf+ Good Color Stamp W/2016 Pse Cert.1875 Us Scott #124, Used With CertificateUsa Scott #9 1ct Used Red Cancel Position 93r1l Doporto Cert Cv $130Csa #11e, Perforated, Og, Mnh, W/ Apex CertUsa Scott #64 3ct Pink Used Weiss Cert Rare Cv $7001893 Us Scott #243 Unused Original Gum Previously Hinged With CertificateDrbobstamps Us Scott #241 Used Vf Stamp W/2016 Pse Cert. 2017 Scv $575Hawaii #51 Superb Never Hinged Gem With Hps Certificate "genuine"Hawaii Document - Certificate Of Clearance Dated 11-1-1861 With D'assis Rn2-t21909 Us Scott #359, Unused With CertificateMr Fancy Cancel 147 Fancy Cancel Cover Eagle In Diamond Pf Cert Ex-weinberg RareHawaii: 1 Cent, Sc 23, Unused No Gum, With Certificate, 4 ScansNoblespirit No Reserve (th1) Popular Us Rw61 Duck Stamp W/pse Cert Mnh = $55 CvUs Scott #c13 65 Cent Zeppelin Mint Og Nh Vf-xf *pse Cert 85* Smq $350 MnhUs Scott #117 F-vf Blue Cancel Scott $245 1999 Aps CertificateTexas Stock Transfer Stamps Lot On Stock Certificate Margins 59 StampsDrbobstamps Us Scott #579 Used Lightly Cancelled Stamp W/ Clean 2016 Pse Cert.U.s. #q2 Choice Mint Xf Nh W/cert - 1913 2c Parcel Post ($65)579 Mog-nh, Xf, With Pse Graded 90 Certificate. Smq $3251894 - Sc# 250 - 2 Cent Washington - Triangles - Pf Cert - Mnh$20 Series Of 1939 Postal Savings System Certificate Rare Interest Paid 9696Drbobstamps Us Scott #569 Mint Og Lh Stamp W/ 2016 Pse Cert. 2017 Scv 37.501909, Us Scott # 371 Unused Graded 90 Xf With CertificateU.s. #114 Mint W/cert - 1869 3c Locomotive ($250)Usa : 1873. Scott #o31 Used. Nice Stamp. Psag Certificate. Catalog $200.00.Usa Confederate #11 With Cert For Fake Perfs, Mint Ng, Free Us Shipping,U.s. #ws2 On Savings Cert - 1917 $5 Green ($45)#65 3¢ Washington, Pale Brown Red, Used, Aps Certificate 10445, Genuine, Cv $31929 Cleveland Securities Company Stock Certificate W/ Ten Revenue Stamps! RareNoblespirit No Reserve (th1) Superb 3¢ Us No. J40 Mnh Vf W/ Cert = $225 CvHawaii #57f Double Overprint Strip Of 5 With Og & Cert $950.00+We Us Stamp #114 3 Cent Cover Grid Detroit To Milwaukee 1869 Docketing Pf Cert#64b Rose Pink Cover With Certificate.#94 3¢ Washington, Used, Aps Certificate #11198, Genuine In All Respects, Cv $101931 North American Edison Company Stock Certificate W/ 10 Revenue Stamps1929 Inland Investors Company Stock Certificate Cincinnati, Ohio Revenue StampsTdstamps: Us Revenue Stamp Scott#r24a 5c Certificate UsedDr Jim Stamps Old Us Revenue Scott R24 5c Certificate Used No ReserveDr Jim Stamps Old Us Revenue Scott R44 25c Certificate Used No Reserve