Guides on discount control, code fraud, and margin protection for Shopify stores.https://promolock.app/https://promolock.app/blog/how-to-block-discount-codes-in-shopify/https://promolock.app/blog/how-to-block-discount-codes-in-shopify/Every way to stop a discount code at checkout — what Shopify can do natively, where it stops, and how to block codes by list, pattern, or condition.Wed, 05 Aug 2026 00:00:00 GMThttps://promolock.app/blog/control-discounts-on-sale-items/https://promolock.app/blog/control-discounts-on-sale-items/Blocking codes on sale items protects margin but costs conversions. A two-rate discount — full rate on regular items, token rate on markdowns — does both jobs.Tue, 04 Aug 2026 00:00:00 GMThttps://promolock.app/blog/block-discount-codes-on-sale-items/https://promolock.app/blog/block-discount-codes-on-sale-items/Marked-down products taking discount codes on top is the most common margin leak in Shopify. Here's why it happens and two ways to stop it.Sun, 02 Aug 2026 00:00:00 GMThttps://promolock.app/blog/exclude-collection-from-discounts/https://promolock.app/blog/exclude-collection-from-discounts/New arrivals, collabs, MAP-protected brands — some collections should never be discounted. What Shopify can do, and how to enforce it properly.Thu, 30 Jul 2026 00:00:00 GMThttps://promolock.app/blog/shopify-one-use-per-customer-not-working/https://promolock.app/blog/shopify-one-use-per-customer-not-working/The limit counts accounts, not people. Here's what it actually enforces, how customers route around it, and what enforcing "one per person" really takes.Mon, 27 Jul 2026 00:00:00 GMThttps://promolock.app/blog/hide-discount-code-field-shopify-checkout/https://promolock.app/blog/hide-discount-code-field-shopify-checkout/There's no setting for it — the field appears whenever an active code exists. Here's the native workaround, its limits, and what to do when you can't hide it.Sat, 25 Jul 2026 00:00:00 GMThttps://promolock.app/blog/stop-discount-code-stacking-shopify/https://promolock.app/blog/stop-discount-code-stacking-shopify/Shopify's combination settings only work if every discount is configured perfectly, forever. Here's how stacking actually happens and how to enforce one code per order.Wed, 22 Jul 2026 00:00:00 GMT