diff --git a/pos_cashdro_refund/static/src/js/payment_cashdro_refund.esm.js b/pos_cashdro_refund/static/src/js/payment_cashdro_refund.esm.js
index de8bc67..05e812b 100644
--- a/pos_cashdro_refund/static/src/js/payment_cashdro_refund.esm.js
+++ b/pos_cashdro_refund/static/src/js/payment_cashdro_refund.esm.js
@@ -77,7 +77,10 @@ PaymentCashdro.prototype._cashdro_send_refund_request = async function (order) {
     const data = JSON.parse(operation_data.data);
     payment_line.cashdro_operation_data = data;
     // CashDro reports the dispensed amount in totalout for payouts.
-    const dispensed = data.operation.totalout / 100;
+    // The API may return totalout as a negative value (money going out),
+    // so we use Math.abs to get the magnitude and explicitly set the
+    // payment line to a negative amount (refund to customer).
+    const dispensed = Math.abs(data.operation.totalout) / 100;
     payment_line.set_amount(-dispensed);
     return true;
 };