Restrict Multi Discount Codes

Develop by K2 Digital

/ Month

3 Days Free Trial

Prevent multiple discount codes at checkout, ensuring only one is applied.

Checkout blocking

One-code enforcement

Instant validation

Localized warnings

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About Restrict Multi Discount Codes

Launched Sep 09, 2025

Built by K2 Digital

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Description

Prevent checkout abuse by enforcing a single discount code. Keep margins healthy and checkout clean.

Stop stacked discounts before they hit your bottom line. One Discount Code Only (Checkout Guard) enforces a strict one-code policy at checkout, preventing customers from applying multiple discount codes in the same order. When more than one code is detected, the extension blocks the checkout flow and clearly prompts the shopper to proceed with a single code. Note: Only works on Shopify Plus plan.

One-code enforcement: Automatically blocks checkout when more than one code.
Localize warning messages across multiple languages to match your store.
Instantly validates discount inputs at checkout without theme changes.

Pros

Prevents customers from applying multiple discount codes, protecting profit margins.
Automatically blocks checkout if more than one code is detected, ensuring a strict one-code policy.
Localizes warning messages in multiple languages to align with the store's language settings.
Validates discount inputs instantly at checkout without requiring changes to the store's theme.

Cons

May lead to customer dissatisfaction if users are accustomed to using multiple codes.
Blocking the checkout process could cause friction or cart abandonment if the warning is not effectively communicated.
Depending on store policies, may require communication efforts to explain the limitation to customers.