# Extra Agreement Checkbox for Certain Products

> Adds a required checkbox to the checkout only when the cart has products from a chosen category, for example "I understand personalised items cannot be returned".

- Type: PHP
- Runs: Run everywhere
- Category: [WooCommerce](https://wpide.com/library/category/woocommerce/)
- Requires: WooCommerce
- Tags: woocommerce, checkout, terms, categories
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/woo-category-terms-checkbox/

## Code

```php
$wpide_cat_terms = array(
    'categories' => array( 'personalised' ), // Category slugs.
    'text'       => 'I understand that personalised items are made to order and cannot be returned.',
);

$wpide_cat_terms_needed = function () use ( $wpide_cat_terms ) {
    if ( ! WC()->cart ) {
        return false;
    }

    foreach ( WC()->cart->get_cart() as $item ) {
        if ( has_term( $wpide_cat_terms['categories'], 'product_cat', $item['product_id'] ) ) {
            return true;
        }
    }

    return false;
};

add_action( 'woocommerce_review_order_before_submit', function () use ( $wpide_cat_terms, $wpide_cat_terms_needed ) {
    if ( ! $wpide_cat_terms_needed() ) {
        return;
    }

    printf(
        '<p class="form-row validate-required wpide-cat-terms"><label class="woocommerce-form__label woocommerce-form__label-for-checkbox checkbox"><input type="checkbox" class="woocommerce-form__input woocommerce-form__input-checkbox input-checkbox" name="wpide_cat_terms" value="1"> <span>%s</span>&nbsp;<abbr class="required" title="required">*</abbr></label></p>',
        esc_html( $wpide_cat_terms['text'] )
    );
}, 9 );

add_action( 'woocommerce_checkout_process', function () use ( $wpide_cat_terms_needed ) {
    // phpcs:ignore WordPress.Security.NonceVerification -- WooCommerce verifies the checkout nonce.
    if ( $wpide_cat_terms_needed() && empty( $_POST['wpide_cat_terms'] ) ) {
        wc_add_notice( 'Please confirm you have read the note about personalised items.', 'error' );
    }
} );

add_action( 'woocommerce_checkout_order_created', function ( $order ) use ( $wpide_cat_terms ) {
    // phpcs:ignore WordPress.Security.NonceVerification -- WooCommerce verifies the checkout nonce.
    if ( ! empty( $_POST['wpide_cat_terms'] ) ) {
        $order->add_order_note( 'Customer accepted: ' . $wpide_cat_terms['text'] );
    }
} );
```

## Notes

The agreement is recorded as an order note so you can show it was accepted.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Extra Agreement Checkbox for Certain Products" 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/