Link Title Description
Introduction
Link 1970s Foster, Tom The Modern ‘Unpaid’ and ‘Tax’ Markings Unpublished draft, finalised by Reg Lant
Link 1981 Lant, Reg  Underpaid & Tax Markings Comprehensive listing of marks known at the time (from BCPSG Journal)
Link 1986 Swarbrick, Bob Modern 'To Pay' Handstamps Follow up to Lant with emphasis on 'Rubber Denomination' handstamps (aka Woodblocks)
Link 2019 Jarvis Introduction
Background
Link Text
Courtesy Strikes
Stamp Removed UPSR
More to Pay UPMP
Detained for Postage UPDP
‘Short Paid Fine’ UPSP
‘Value Of Stamps / Due To Be Collected’ UPVS
‘4d’ in circle UP4d
– Not Enclosed In Mail UPNE
‘Returned for Postage’ / ‘Additional Postage’ UPRP
 ‘RECEIVED AT G.P.O./ KINGSTON 2 / WITHOUT POSTAGE STAMPS’ UPNS-DM03
Insufficiently Paid UPIN
Link Simplex Marks
“T” in Triangle Tax Markings UPTT
‘T’" in Single Circle Tax Markings UPTC
Centimes in Single Circle UPCS
Link Unpaid Rubber Denominations (aka ‘Woodblocks’ UPRD
Link Tax and Centime Duplex Markings UPTD
Link Manuscript Markings UPMS
Link Rectangular & Square Framed Tax
Rectangular Framed Tax Markings (Air Mail) UPTR
Tax in Square Frame Types UPTS
Link Fractional Postage Due Charges
Fractional Tax In Square Frame Markings UPFS
Fraction and Tax in Circle UPFC
Fraction and Centimes Duplex UPFD
Link Airmail Types
Insufficiently Paid Air Mail UPIP
Second Class Air Mail Markings. UPSC
Article Enclosed UPAE
Link UPST Stationery
Registration
Late Fee
Redirection
Express
Inland Free