# Allow Each Customer to Buy a Product Only Once

> Stops logged-in customers from buying the same product twice, for example a course, a membership or a limited item, and tells them they already own it.

- Type: PHP
- Runs: Run everywhere
- Category: [WooCommerce](https://wpide.com/library/category/woocommerce/)
- Requires: WooCommerce
- Tags: woocommerce, products, limits, customers
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/woo-prevent-repeat-purchase/

## Code

```php
$wpide_once_products = array(); // Product IDs limited to one purchase, empty for all.

add_filter( 'woocommerce_is_purchasable', function ( $purchasable, $product ) use ( $wpide_once_products ) {
    if ( ! $purchasable || ! is_user_logged_in() ) {
        return $purchasable;
    }

    $id = $product->get_parent_id() ? $product->get_parent_id() : $product->get_id();

    if ( $wpide_once_products && ! in_array( $id, array_map( 'intval', $wpide_once_products ), true ) ) {
        return $purchasable;
    }

    $user = wp_get_current_user();

    return wc_customer_bought_product( $user->user_email, $user->ID, $id ) ? false : $purchasable;
}, 20, 2 );

add_action( 'woocommerce_single_product_summary', function () use ( $wpide_once_products ) {
    global $product;

    if ( ! is_user_logged_in() || ! $product instanceof WC_Product ) {
        return;
    }

    if ( $wpide_once_products && ! in_array( $product->get_id(), array_map( 'intval', $wpide_once_products ), true ) ) {
        return;
    }

    $user = wp_get_current_user();

    if ( wc_customer_bought_product( $user->user_email, $user->ID, $product->get_id() ) ) {
        echo '<p class="wpide-already-bought">' . esc_html( 'You have already purchased this product.' ) . '</p>';
    }
}, 31 );
```

## Notes

List product IDs in $product_ids to limit only those, or leave it empty for all products. Guests cannot be checked, so consider requiring an account.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Allow Each Customer to Buy a Product Only Once" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/