Checkout Rules stops orders you can't or won't fulfil before they're placed. Pick one of 24 templates, such as an order minimum, a quantity cap or a delivery-country list, adjust it, and test it on carts built around its own limits. Each rule reads back in plain English and runs on cart changes, at checkout or both. Shoppers who break a rule see your message and can fix their cart. Rules run inside Shopify's checkout, so nothing is added to your theme.

• Block carts on subtotal, quantity, SKU, product type, tags or delivery country
• 24 ready-made templates in five categories, all adjustable before saving
• Choose whether each rule checks cart changes, checkout, or both
• Test on carts built around each rule's limits before shoppers see it
• See every rule in plain English, in the app, in Settings and in Sidekick