CartGate: Checkout Rules
CartGate: Checkout Rules is an app designed to prevent orders with incompatible products from being processed at checkout. It allows merchants to set rules based on products, variants, or collections to block carts or warn customers before purchase. The app ensures that these rules apply even when customers use Apple Pay or Shop Pay, reducing the need for refunds on orders that should not have been placed.
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This app completely fixed two problems that we struggled with for months. First, card testers were buying our $5 USB cable to test stolen cards. Every time it happened, we had to pay $15 in chargeback and refund fees. We tried catching them with Shopify Flow, but the bad orders always made their way through. CartGate let us say "cables can only be bought alongside a TRMNL" and the fraud orders completely stopped. Second, we sell hardware with a stack of upgrade options (bigger battery, developer edition, etc.), and we also sell a bundle that includes all of them. People kept ordering the "all upgrades" option alongside the "battery upgrade" option, so they were getting the battery upgrade twice. We'd have to fix these orders by hand. CartGate let us block checkout when these bad carts would happen. We haven't had a bad order since then. Was a better experience for both us and the customer. Can't recommend enough.
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