Challenge
Orders were arriving in SAP with invalid addresses: some had only a house number, others contained post office box entries in the street field. Fulfillment was failing or requiring manual correction. The checkout used a single free-text address line with no enforcement of the street/house number split and no country-specific validation rules.
What Was Built
Single address field split into dedicated Street and House Number fields with individual validation rules. Custom JS validation with inline error messages for both fields. Netherlands-specific postal code validation and auto-formatting (automatic space insertion in the correct position). Server-side validation mirroring frontend rules for API and backend order creation. Full regression testing across guest, logged-in, address book pre-fill, and multiple storeviews.
Outcome
SAP receives complete, correctly structured address data on every order. Post-launch monitoring of a batch of new orders confirmed no address-related fulfillment failures.
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