Check Character
The format of the PPS number is seven digits plus a check character. A second character may be used. If so it is always a 'W'.
The check character is calculated using a weighted addition of all the numbers and modulus calculation. It therefore checks for incorrectly entered digits and for digit transposition (digits in the wrong order will alter the sum due to weightings).
Read more about this topic: Personal Public Service Number
Famous quotes containing the words check and/or character:
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—Andrew Jackson (1767–1845)
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—Ralph Waldo Emerson (1803–1882)