If you’re wanting to ensure that you don’t send a parcel to the wrong address because of a typo, you can install an address validation app, available through the Shopify app store. The two top Shopify address checker apps are: Address Validator that has a generous free plan. The app will prompt customers for their correct address, with the prompts customised according to your store branding. Streetify charges 3c per lookup and offers a 7-day free trial. App shows entered address and matched address through backend address verification log.