diff --git a/src/api/types.ts b/src/api/types.ts
index b196527..1b982f6 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -560,8 +560,16 @@ export interface OrderRow {
    */
   ordervalue?: number;
   orderamount?: number;
-  /** Cash to collect on delivery. Shown only when > 0. */
-  collectionamt?: number;
+  /*
+   * `collectionamt` was declared here and read by the order drawer. It does not
+   * exist in Fiesta — `grep -rn "collectionamt" --include=*.go` returns nothing
+   * — so it showed a dash from the day it was written. Removed 2026-09-28.
+   *
+   * A type can describe a field the server has never sent, and nothing catches
+   * it: the optional marker makes `undefined` legal, and `?? 0` turns it into a
+   * plausible figure. Worth remembering before the next optional money field is
+   * added on the strength of a field name.
+   */
   deliverycharge?: number;
   deliveryamt?: number;
   paymenttype?: number;
diff --git a/src/features/store-admin/OrderDetailDrawer.tsx b/src/features/store-admin/OrderDetailDrawer.tsx
index b9097ca..9ddbabf 100644
--- a/src/features/store-admin/OrderDetailDrawer.tsx
+++ b/src/features/store-admin/OrderDetailDrawer.tsx
@@ -185,19 +185,23 @@ function Sheet({
           label="Value"
           value={value > 0 ? moneyExact(value) : detailAmount > 0 ? moneyExact(detailAmount) : '—'}
         />
+        {/* A delivery shows what the rider is paid. An order has no second
+            money figure worth the space: "Cash to collect" stood here and read
+            `collectionamt`, which Fiesta does not have — `grep --include=*.go`
+            finds nothing — so it was a dash on every order ever opened.
+
+            Nor can it be derived. Measured across 800 live orders spanning
+            three tenants and two regions, including 247 delivered ones,
+            `orders.paymenttype` is 42 on every row and `paymentstatus` is not
+            returned by `getorders` at all. Nothing in the data separates a cash
+            order from a prepaid one. */}
         {job ? (
           <Metric
             label="Rider charge"
             value={job.deliverycharges ? moneyExact(job.deliverycharges) : '—'}
             isSmall
           />
-        ) : (
-          <Metric
-            label="Cash to collect"
-            value={order?.collectionamt ? moneyExact(order.collectionamt) : '—'}
-            isSmall
-          />
-        )}
+        ) : null}
         {/* Counted from the lines when the row carries no count. `itemcount`
             and `quantity` are both routinely absent on the list read, which is
             what made this a dash on an order that plainly had something in it. */}