PO Box Blocker — AddressFence

Block PO boxes and parcel lockers in the shipping address at checkout, with ZIP rules included free.

AddressFence stops PO box and parcel locker addresses from being used as the shipping address at checkout. Install, turn on the PO box and locker rules, and they work right away; a small set of ZIP/postal rules is included free. When you need more, paid upgrades add street-number checks, custom checkout error messages, region rules, CSV import, billing-address rules and allowlists. Test any address in the simulator before publishing, with one-click rollback.

• Block PO boxes and parcel lockers in the shipping address at checkout.
• Add a small set of ZIP/postal code rules on the free plan.
• Simulator: test any address before publishing, with one-click rollback.
• Upgrade for street-number checks, custom error messages, regions and CSV.
• Upgrade for billing-address rules and allowlists for trusted addresses.