Validating sin numbers

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One problem with this solution is that it assumes that number, represented as an integer, is 9 digits (can't start with a 0).

If the number can start with a 0, then it has to be represented as a string (or converted to a string and padding with zeros).

Be aware that numeric input includes dates and times, whole numbers, and decimal values.

To allow only text in a cell, you can use data validation with a custom formula based on the ISTEXT function.

Often, these individuals must have an employment authorization in order to work in Canada.

SINs beginning with a "9" are different from SINs assigned to citizens and permanent residents, because they have an expiry date (which usually coincides with the expiration of the holder's work permit).

The top of the card has changed over the years as the departments that are responsible for the card have changed: Through functionality creep, the SIN has become a national identification number, in much the same way that the Social Security Number has in the United States.

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Data validation rules are triggered when a user adds or changes a cell value.

The logic to test will remain mostly intact, but the parts that assume integers will need to be swapped out with strings, and then you'll have to do parsing.

def check(SIN): SIN = ''.join(SIN.split(' ')) if len(SIN) !

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