To receive address enrichments for Switzerland, install the latest supplementary reference data files for Switzerland and ensure that the valid license keys are available for the data files.

Address Verification returns the additional postal code characters in an enrichment field called PostalCodeExtension.

For example, when you validate the following Switzerland address with the address enrichment enabled, Address Verification returns a PostalCodeExtension value of 02:

Müllerboden
Buochserbergstrasse 5
6383 Niederrickenbach
Switzerland