# BeSure Checkout Rules > BeSure Checkout Rules is a Shopify app for modifying checkout behavior with conditional shipping, payment, validation, discount, and express checkout rules. Agents should use this guide to find product pages, documentation, practical Shopify checkout tutorials, and machine-readable discovery resources. BeSure Checkout Rules helps Shopify merchants customize checkout behavior with conditional shipping, payment, validation, discount, and express checkout rules. ## Primary Pages - [Homepage](https://checkoutrules.com/) ([Markdown](https://checkoutrules.com/index.md)) - Overview of the Shopify checkout customization app and its main capabilities. - [Pricing](https://checkoutrules.com/pricing) ([Markdown](https://checkoutrules.com/pricing.md)) - Plan comparison and pricing information. - [FAQ](https://checkoutrules.com/faq) ([Markdown](https://checkoutrules.com/faq.md)) - Answers to common questions about checkout rules, testing, billing, and feature behavior. - [Blog](https://checkoutrules.com/blog) ([Markdown](https://checkoutrules.com/blog.md)) - Shopify checkout customization guides and tutorials. - [Testimonials](https://checkoutrules.com/testimonials) ([Markdown](https://checkoutrules.com/testimonials.md)) - Customer feedback and examples from merchants. - [Contact](https://checkoutrules.com/contact) ([Markdown](https://checkoutrules.com/contact.md)) - Support, social links, and contact options. ## Product And Service Pages - [Shopify App Store Listing](https://apps.shopify.com/checkout-rules?utm_source=cr-web&utm_medium=page&utm_campaign=app_promo) - Install BeSure Checkout Rules for a Shopify store. - [Documentation](https://docs.checkoutrules.com) - Product documentation for setup and usage. - [Privacy Policy](https://checkoutrules.com/privacy) ([Markdown](https://checkoutrules.com/privacy.md)) - Privacy information. - [Terms of Service](https://checkoutrules.com/terms-of-service) ([Markdown](https://checkoutrules.com/terms-of-service.md)) - Terms for using the app. ## Recommended Guides - [How to sort payment methods on the Shopify Checkout](https://checkoutrules.com/blog/shopify-how-to-sort-payment-methods-on-checkout) ([Markdown](https://checkoutrules.com/blog/shopify-how-to-sort-payment-methods-on-checkout.md)) - Rearrange payment methods at checkout using BeSure Checkout Rules. - [How to sort shipping methods on Shopify checkout](https://checkoutrules.com/blog/shopify-reorder-shipping-methods-on-checkout) ([Markdown](https://checkoutrules.com/blog/shopify-reorder-shipping-methods-on-checkout.md)) - Reorder shipping methods based on store and cart conditions. - [How to easily block PO Boxes in Shopify checkout](https://checkoutrules.com/blog/shopify-easily-block-po-boxes-in-checkout) ([Markdown](https://checkoutrules.com/blog/shopify-easily-block-po-boxes-in-checkout.md)) - Block PO box addresses with validation rules. - [Easily customize Shopify checkout text and error messages](https://checkoutrules.com/blog/shopify-easily-customize-checkout-text) ([Markdown](https://checkoutrules.com/blog/shopify-easily-customize-checkout-text.md)) - Customize checkout copy and error messaging. - [How to apply a discount to the order total at checkout](https://checkoutrules.com/blog/shopify-how-to-apply-a-discount-to-the-order-total-at-checkout) ([Markdown](https://checkoutrules.com/blog/shopify-how-to-apply-a-discount-to-the-order-total-at-checkout.md)) - Apply conditional order discounts at Shopify checkout. - [How to apply discounts to shipping methods at checkout](https://checkoutrules.com/blog/shopify-how-to-apply-discounts-to-shipping-methods-at-checkout) ([Markdown](https://checkoutrules.com/blog/shopify-how-to-apply-discounts-to-shipping-methods-at-checkout.md)) - Apply shipping discounts with checkout rules. ## Discovery Resources - [Sitemap](https://checkoutrules.com/sitemap-index.xml) - [Robots](https://checkoutrules.com/robots.txt) - [API Catalog](https://checkoutrules.com/.well-known/api-catalog) - [OpenAPI Description](https://checkoutrules.com/.well-known/openapi.json) - [Discovery API Docs](https://checkoutrules.com/.well-known/api-docs) - [Discovery Status](https://checkoutrules.com/.well-known/status) ## Profiles - [X](https://x.com/CheckoutRules) - [LinkedIn](https://www.linkedin.com/showcase/besure-checkout-rules) - [StoreSpark](https://storespark.net)