ZIP Lock ‑ Restrict ZIP Codes

Set up rules to restrict ZIP codes or states at checkout, controlling which products customers can purchase based on their shipping ZIP/postal code or state/province. When a restriction rule is triggered, the ZIP Lock app displays an error message and prevents checkout. You can apply restrict ZIP code rules to all products, specific products, or entire collections, and even exempt certain customers. Built using Shopify’s checkout UI extensions—no theme changes required. Shopify Plus only.