Accessory Guard helps Shopify merchants prevent invalid standalone purchases with simple product-level dependency rules. If a customer adds an accessory, spare part, refill item, or add-on without the required base product, the app blocks checkout and shows a clear message. Optional theme app embeds warn shoppers on product and cart pages. Create rules in minutes, customize messages, and reduce refunds, cancellations, and support tickets.

• Block checkout when dependent products are missing their required base product
• Show optional warnings on product pages and in the cart with theme app embeds
• Customize checkout and storefront messages from Settings
• Create product-level rules for accessories, parts, refills, and add-ons
• Reduce invalid orders, refunds, and support tickets