> ## Documentation Index > Fetch the complete documentation index at: https://www.referly.so/docs/llms.txt > Use this file to discover all available pages before exploring further. # Restrict a code > Restrict a coupon code in Referly. Limit it to specific products, require a minimum order, allow first-time customers only, cap total redemptions, or set an expiry date so discounts apply exactly where you want. Restrictions control exactly when a code works — which products it covers, how big the order has to be, whether it's for new customers only, and when it stops. Setting the right limits protects your margins and keeps a deal doing what you intended. You set restrictions while [creating a coupon](/docs/help-center/engage/coupons/create) or by opening an existing coupon from your library and editing it. ## Limit to specific products By default a code applies to the whole order. Turn on **Limit to specific products** and choose which products (or, on some platforms, collections) the discount covers. The code then only takes money off those items — useful when you want affiliates promoting one product line, not your entire catalogue. ## Require a minimum order Set a **minimum order amount** so the code only works once the cart reaches a value you choose. Leave it as **No minimum** to let the code apply to any order. A minimum is a simple way to protect margin — for example, only give 20% off on orders over \$50. ## First-time customers only Turn on **first-time order only** to make the code work for a customer's first purchase and not for repeat orders. This is common for acquisition deals, where the discount is meant to win a new customer rather than reward an existing one. ## Cap redemptions and set an expiry Under **Redemption Limits** you control how long and how widely a code lives: * **Maximum redemptions** — the total number of times the code can be used before it stops working. Leave it as **Unlimited** for no cap. A cap is handy for limited launches or a set number of early-bird deals. * **Expiry date** — a date after which the code no longer works, so a seasonal promotion ends on its own. ## Limit who can use a code You can also tie a code to one person so nobody else can use it: * **Limit to specific affiliate** — the code only credits and works for that affiliate. * **Limit to specific customer** — the code only works for that one customer. Both of these are set on the code itself — see [Promotional codes](/docs/help-center/engage/coupons/promotional-codes) for how they affect tracking. Restrictions stack. A single code can require a minimum order, apply to first-time customers only, cover just one product, and expire on a set date — all at once. Only set the limits you actually need so the code stays easy for customers to use. ## Related Tie a code to a specific affiliate or customer. Apply the same rules to codes generated for every affiliate. Set up the discount you're restricting. See how coupons fit into your program.