What's behind these secret marks on postage stamps? | ScienceBlogs
Royal Mail stamp swap out scheme | Consumer Council
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VAT on stamps, postage, and delivery charges
Match tax stamps – British Matchbox Label and Bookmatch Society
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Royal Mail urges people to use or swap non-barcoded stamps | Saving money | The Guardian
StampsPhilately - Spain Charity Fund Label Stamp. 10cts, Mutualidad de Correos; Aportacion voluntaria. From what I read, it had postage validity so it is not a cinderella stamp. "Issued by the Postal
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Match tax stamps – British Matchbox Label and Bookmatch Society
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Royal Mail stamps scandal: Innocent Britons forced to pay for mail after Post Office sells counterfeit stamps
Lot 287 - Postal History: Iraq – Mosul. A Collection
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When do old stamps expire? How long you can use non-barcode stamps and how to exchange them with Royal Mail
Airposts and their Stamps (1921) - Philatelic Database
Lot 293 - Postal History: Persian Gulf/Mesopotamia. A
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Is Stamp Duty Tax Deductible in the UK?
Charities Accepting Used Postage Stamps as Donations – Recycle Stamps
Royal Mail to hike prices on all first and second class stamps amid barcode shake-up - Mirror Online
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Royal Mail stamp swap scheme opens - how it works before millions become worthless - Mirror Online
Paper Heritage : Ecuador - Stamps : Tobacco Tax Railroad Train
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