CartShield: Checkout Rules
- by ModApps
- Free plan available. Free trial available.
- by ModApps
- Free plan available. Free trial available.
Enforce server-side checkout rules to stop invalid orders, block PO Boxes, and prevent courier penalties with unbypassable validation.
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About the CartShield: Checkout Rules
CartShield validates checkout orders server-side using Shopify Functions to stop invalid purchases and prevent courier delivery penalties. Unlike cart scripts that express wallets and browser tools can bypass, CartShield enforces checkout rules that cannot be skipped.
Block PO Boxes and parcel lockers when shipping heavy freight or restricted items. Require customers to add qualifying catalog products before purchasing discounted sample kits. Enforce B2B wholesale case pack multiples like cartons of 6, 12, or 24 units. Set minimum or maximum spending limits per product collection.
Works across all checkout flows including one-page checkout and digital wallets. Edge execution means zero theme code changes and no store slowdown. Protect your profits by stopping unauthorized orders before they process.
Launched: November 3, 2026
Key features
- Block PO Boxes and parcel lockers for heavy freight and restricted items
- Require qualifying catalog items to purchase discounted sample kits
- Enforce B2B wholesale case pack multiples like cartons of 6, 12, or 24
- Validate checkout server-side across express digital wallets and one-page flows
- Set minimum or maximum cart spending limits per product collection
Integrations with:
- Checkout
Category:
Pricing of CartShield: Checkout Rules
Free Starter
Free
- 1 Active Checkout Validation Rule
- Standard PO Box & Address Validation
- Sub-5ms WebAssembly Edge Execution
- Community Support
Pro Protection
$19.99 / month
or $190/year and save 21%
- Unlimited active validation rules
- PO Box and delivery blocker
- Sample kit purchase guard
- B2B wholesale carton multiples
- Collection min and max spend limits
- Custom checkout error messages
- Real-time loss prevention telemetry
- Priority 24/7 merchant support