While stamps can be used in financial transactions, they are not considered legal tender in the United States. The term "legal tender" refers to denominations that lenders are legally obligated to accept as payment for a... More »

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United States currency does not become obsolete when new designs are introduced, according to the United States Department of the Treasury. However, businesses are not required by law to accept any particular form of cur... More »

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Scottish bank notes are technically not legal tender in England and Wales, according to the Bank of England. However, if the parties involved in a financial transaction agree, Scottish bank notes can be used for transact... More »

The price of a first-class postage stamp in the United States in 1982 was 20 cents. This is the equivalent of 47.6 cents in 2012 dollars; in 2012, the price of a stamp was actually 45 cents. The price of stamps was raise... More »

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Postage stamps from the United States do not expire, as long as they haven't been used already. Stamps can be used no matter how old they are, as long as correct postage is on the item to be posted. More »

www.reference.com Business & Finance Mail & Shipping Postal Services

To post a letter-sized envelope from the United States to Northern Ireland costs $1.15 as of April 2014. At the current price of 46 cents per stamp, a letter would require at least three stamps. However, exact postage ca... More »

As of June 2014, it costs 70 cents to mail a standard letter weighing 33.5 grams within the United States. The exact number of stamps required varies based on the value of each individual stamp placed on the envelope. Th... More »