# PromoLock

> PromoLock is a Shopify app that enforces the rules discount codes must follow at checkout — blocking stacking, keeping codes off sale items, generating fraud-safe bulk codes, stopping one person from redeeming codes through duplicate accounts — and measures the unintended discount loss when a code gets past the rules. It runs inside Shopify's checkout, touches no theme code, and fails open so checkout is never at risk. Every PromoLock plan also includes LeakHunt, a companion app that finds the store's codes on public coupon sites and blocks leaked codes for shoppers using coupon browser extensions.

Install: https://apps.shopify.com/promolock
Support: support@promolock.app

## Docs

- [What is PromoLock?](https://promolock.app/docs/): overview of the tools and how enforcement works
- [Getting started](https://promolock.app/docs/getting-started/): install, trial, setup guide
- [Controller](https://promolock.app/docs/features/controller/): shop-wide locks (stacking, sale items, gift cards), code patterns, custom rules
- [Discounts](https://promolock.app/docs/features/discounts/): offer builder — conditions, cart groups, caps, abuse guards
- [Bulk codes](https://promolock.app/docs/features/bulk-codes/): up to 100,000 unique single-use codes behind one offer
- [Fraud Guard](https://promolock.app/docs/features/fraud-guard/): one code per person, not per account (Shopify Plus)
- [Analytics](https://promolock.app/docs/features/analytics/): what discounts give away (with per-order cap what-ifs), plus sale-item loss and stacking loss, measured from order history
- [LeakHunt](https://promolock.app/docs/features/leakhunt/): included companion app — finds your codes on coupon sites and verifies which still work (Leak Radar), and rejects leaked codes for shoppers running coupon browser extensions (Extension Guard)
- [FAQ](https://promolock.app/docs/faq/): common questions

## Strategies

- [Stop discount loss from day one](https://promolock.app/docs/strategies/day-one/)
- [Run a safe sitewide sale](https://promolock.app/docs/strategies/safe-sale/)
- [Offers with caps](https://promolock.app/docs/strategies/offer-with-caps/)
- [Fraud-proof every one-per-customer code](https://promolock.app/docs/strategies/fraud-proof-codes/)
- [Controlled discounts on sale items](https://promolock.app/docs/strategies/controlled-sale-discounts/)
- [Caps from your order history](https://promolock.app/docs/strategies/caps-from-history/)

## Guides

- [Stop codes from stacking](https://promolock.app/docs/guides/stop-stacking/)
- [Keep codes off sale items](https://promolock.app/docs/guides/block-sale-items/)
- [Block or allow specific codes](https://promolock.app/docs/guides/block-specific-codes/)
- [Write your first custom rule](https://promolock.app/docs/guides/first-custom-rule/)
- [Create a tiered discount with a cap](https://promolock.app/docs/guides/tiered-discount/)
- [Launch a bulk code campaign](https://promolock.app/docs/guides/bulk-campaign/)

## Blog

- [How to block discount codes in Shopify](https://promolock.app/blog/how-to-block-discount-codes-in-shopify/)
- [Shopify "one use per customer" not working? Here's why](https://promolock.app/blog/shopify-one-use-per-customer-not-working/)
- [How to stop discount codes from stacking in Shopify](https://promolock.app/blog/stop-discount-code-stacking-shopify/)
- [How to block discount codes on sale items in Shopify](https://promolock.app/blog/block-discount-codes-on-sale-items/)
- [How to control discounts on sale items in Shopify](https://promolock.app/blog/control-discounts-on-sale-items/)
- [How to exclude a collection from discounts in Shopify](https://promolock.app/blog/exclude-collection-from-discounts/)
- [How to hide the discount code field in Shopify checkout](https://promolock.app/blog/hide-discount-code-field-shopify-checkout/)
- [How to set a maximum discount amount in Shopify](https://promolock.app/blog/set-maximum-discount-amount-shopify/)
- [How to cap Klaviyo discount codes in Shopify](https://promolock.app/blog/cap-klaviyo-discount-codes-shopify/)
- [How to block Honey and coupon extensions on Shopify](https://promolock.app/blog/block-honey-coupon-extensions-shopify/)
- [Shopify discount code leaked? How to find and kill it](https://promolock.app/blog/shopify-discount-code-leaked/)
- [How coupon sites get your discount codes](https://promolock.app/blog/how-coupon-sites-get-your-discount-codes/)
- [Your influencer's Shopify code is on Honey. Now what?](https://promolock.app/blog/influencer-discount-code-on-honey/)

## Legal

- [Privacy Policy](https://promolock.app/privacy-policy/)
- [Data Processing Agreement](https://promolock.app/dpa/)