Postcode Shipping Guard

Block checkout shipping for specific destination postcodes (optionally scoped to a country). Prevent impossible destinations, reduce loss-making shipments, and stop orders going to regions you don’t service.

• Blocks restricted postcodes at checkout. If a destination matches one of your rules, the app hides all available shipping methods for that checkout step so the buyer can’t complete checkout until they change their address.
• Simple rules: exact codes or prefix wildcards. Define one “problem region” per rule using postcodes or prefixes like 90210 or 941*, and optionally scope it to a country code (US, CA, GB, AU, etc.).
• Optional cart notice + privacy-safe by design. Enable an optional fixed cart message (theme block) to set expectations before checkout. Enforcement still follows your rules, and the function runs without external network calls or storing buyer addresses.