Postage stamps are used to indicate that the fee for mailing a letter has been paid.
Africa
African postage stamps are used to indicate that the fee for mailing a letter in Africa has been paid.
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Asia
Asian postage stamps are used to indicate that the fee for mailing a letter in Asia has been paid.
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Europe
European postage stamps are used to indicate that the fee for mailing a letter in Europe has been paid.
British Commonwealth,
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North America
North American postage stamps are used to indicate that the fee for mailing a letter in North America has been paid.
United States,
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Oceania
Australian postage stamps are used to indicate that the fee for mailing a letter in Australia has been paid.
Australia,
New Zealand,
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South America
South American postage stamps are used to indicate that the fee for mailing a letter in South America has been paid.
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