diff --git a/apps/storefront/lib/ai/tools.ts b/apps/storefront/lib/ai/tools.ts
index d863021..767eebc 100644
--- a/apps/storefront/lib/ai/tools.ts
+++ b/apps/storefront/lib/ai/tools.ts
@@ -158,6 +158,12 @@ export function createTools(customerId: string, _conversationId?: string) {
         }
 
         const payment = await db.selectPayment(orderId);
+        if (!payment) {
+          return {
+            refunded: false as const,
+            reason: `No payment record found for order ${orderId}`,
+          };
+        }
         const refund = await issueRefund({
           chargeId: payment.chargeId,
           amount: order.total.amount,
diff --git a/apps/storefront/lib/db/index.ts b/apps/storefront/lib/db/index.ts
index 0b1d245..5f39934 100644
--- a/apps/storefront/lib/db/index.ts
+++ b/apps/storefront/lib/db/index.ts
@@ -196,14 +196,14 @@ export async function selectOrder(
 }
 
 // Orders placed before the payments launch have no payment row.
-export async function selectPayment(orderId: string): Promise<Payment> {
+export async function selectPayment(orderId: string): Promise<Payment | undefined> {
   const [row] = await db
     .select()
     .from(payments)
     .where(eq(payments.orderId, orderId))
     .limit(1);
 
-  return row as Payment;
+  return row;
 }
 
 export async function selectOrders(