Brian Dunning's FileMaker Custom Functions

IsValidSofiNumber ( sofinummer )

Checks a Dutch sofinumber for validity.

  Average rating: 4.1 (29 votes) Log in to vote

Theo Ros   Theo Ros

Share on Facebook Share on Twitter

  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.



Log in to post comments.


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

Support this website.

This library has been a free commmunity resource for FileMaker users and developers for 15 years. It receives no funding and has no advertisements. If it has helped you out, I'd really appreciate it if you could contribute whatever you think it's worth: