Brian Dunning's FileMaker Custom Functions

IsValidSofiNumber ( sofinummer )

Checks a Dutch sofinumber for validity.

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Theo Ros   Theo Ros

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  Sample input:
IsValidSofiNumber ( "123456789" )
  Sample output:

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Returns "true" if sofinummer passes the '11-proef',
"false" if not or an empty string if sofinummer is empty.



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Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

Under construction. Email me your wish list for improvements.