IsValidABN ( text )
Validates Australian ABN numbers.
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|Vaughan Bromfield - Show more from this author|
Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
Validates Australian ABN numbers. The result is either 0 (not valid) or 1 (valid ). Null imput evaluates to 1.
It ignors all spaces and other separators.
This function uses the checksum algortithm as published by the Australian Government.
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