# Stop Certain Products From Being Purchased Together on Shopify

URL: https://geofraudshield.com/blog/prevent-products-purchased-together-shopify
Published: 2026-10-03
Reading time: 7 min read
Category: Tutorial
Author: Robert John, Founder & CEO at Blockly (https://geofraudshield.com/about#robert-john)
Publisher: Blockly (https://geofraudshield.com)

## TL;DR

Some products should never share a cart. Learn how to block risky combinations like gift cards with discounted bundles, hazmat with air shipping, or pre-orders with in-stock items using Shopify Functions.

## Key points

- hazmat for aerosols, batteries, and flammable items
- pre-order for items not yet in stock
- gift-card or the native gift card product type
- bundle-promo for discounted bundles
- subscription for subscription-only items

## Questions this answers

- How does shopify work on Shopify?
- How does checkout customization work on Shopify?
- How does cart validation work on Shopify?
- How does shopify functions work on Shopify?
- How does pre orders work on Shopify?

## Primary sources referenced

- Shopify Functions (Shopify developer docs): https://shopify.dev/docs/apps/build/functions

## Citation format

Blockly (2026). Stop Certain Products From Being Purchased Together on Shopify. https://geofraudshield.com/blog/prevent-products-purchased-together-shopify