# Limit the number of discount coupon uses

Discount coupons can additionally be limited by the number of their uses. This allows you to create **one-time use coupons** for customers.

{% hint style="info" %}
If you don't yet have an app for Ecwid API access, start with the following [instructions](https://app.gitbook.com/s/uOzT5egoVTAjMJwRuMQT/get-started/set-up-your-dev-environment-in-ecwid#step-2.-get-your-first-application).
{% endhint %}

If you have an existing discount coupon, you can limit its usage to **new or regular customers only** with the following API call:

```http
PUT /api/v3/STOREID/discount_coupons/DISCOUNTCOUPONID
Host: app.ecwid.com
Content-Type: application/json
Authorization: Bearer secret_token

{
    "usesLimit": "ONCEPERCUSTOMER"
}
```

where `usesLimit` must be one of:

* `UNLIMITED` - no uses limit (use it to remove the limitation).
* `ONCEPERCUSTOMER` - discount coupon can be applied only once by every customer. Unique customers are defined by the email they enter at the checkout.
* `SINGLE` - discount coupon can be applied only once.

Change `STOREID` with your store ID, `DISCOUNTCOUPONID` with the discount coupon ID ([find discount coupon ID](https://app.gitbook.com/s/G9n5VxMY9T0Ob3D56PSD/rest-api/discounts/discount-coupons/search-discount-coupons)), and the `secret_token` with the secret access token of your app.