diff --git a/app/helpers/Woo_Helper.php b/app/helpers/Woo_Helper.php
index d75eedc..d36ad47 100644
--- a/app/helpers/Woo_Helper.php
+++ b/app/helpers/Woo_Helper.php
@@ -324,6 +324,51 @@ class PEPPOL_Woo_Helper {
         return array_values($vat_fields_found);
     }
 
+    /**
+     * Retourne les infos de paiement utiles pour Peppol.
+     *
+     * @param \WC_Order|int $order
+     * @return array{payment_method:string,payment_method_title:string,payment_means_code:string,payment_terms:string}
+     */
+    public static function esi_get_order_payment_data( $order ): array {
+        if ( is_numeric( $order ) ) {
+            $order = wc_get_order( $order );
+        }
+
+        if ( ! $order instanceof \WC_Order ) {
+            return [
+                'payment_method'       => '',
+                'payment_method_title' => '',
+                'payment_means_code'   => '30',
+                'payment_terms'        => '',
+            ];
+        }
+
+        $payment_method = (string) $order->get_payment_method();
+        $payment_method_title = (string) $order->get_payment_method_title();
+
+        // Valeur par defaut : virement (code 30)
+        $payment_means_code = '30';
+
+        $map = [
+            'bacs'   => '30', // virement bancaire
+            'cheque' => '20',
+            'cod'    => '10', // cash on delivery
+        ];
+        if ( isset( $map[ $payment_method ] ) ) {
+            $payment_means_code = $map[ $payment_method ];
+        }
+
+        $data = [
+            'payment_method'       => $payment_method,
+            'payment_method_title' => $payment_method_title,
+            'payment_means_code'   => $payment_means_code,
+            'payment_terms'        => '',
+        ];
+
+        return apply_filters( 'esi_peppol_order_payment_data', $data, $order );
+    }
+
     public static function esi_is_wpo_wcpdf_installed(): bool {
         if (!function_exists('get_plugins')) {
             require_once ABSPATH . 'wp-admin/includes/plugin.php';