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Packages with excessive postage, using postage stamps as opposed to a meter
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Packages containing oily stains, crystallization on wrapper or strange odors
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No return address
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Exceptionally large or lopsided packages
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Packages that are rigid, bulky or discolored
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Packages that appear to contain liquid
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Packages which display evidence or electrical wire or tin foil
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Excessive wrapping materials, such as masking tape, strapping tape, or string