diff --git a/components/InvoiceMatchHost.tsx b/components/InvoiceMatchHost.tsx
index 774052a..aae224a 100644
--- a/components/InvoiceMatchHost.tsx
+++ b/components/InvoiceMatchHost.tsx
@@ -7,9 +7,11 @@ import {
   RUN_EVENT,
   collectMatched,
   matchInvoice,
+  saveReviewNote,
   undoMatched,
   type InvoiceMatchResult,
   type MatchedLine,
+  type ReviewLine,
 } from '@/lib/invoiceCheck';
 
 interface InvoiceMatchHostProps {
@@ -31,6 +33,11 @@ export default function InvoiceMatchHost({ onCollected, onRestored }: InvoiceMat
   const [collected, setCollected] = useState<MatchedLine[]>([]);
   const [failedIds, setFailedIds] = useState<string[]>([]);
   const [error, setError] = useState('');
+  const [noteFor, setNoteFor] = useState<string | null>(null);
+  const [noteText, setNoteText] = useState('');
+  const [noteBusy, setNoteBusy] = useState(false);
+  const [noteError, setNoteError] = useState('');
+  const [savedNotes, setSavedNotes] = useState<string[]>([]);
   const running = useRef(false);
 
   const run = useCallback(
@@ -44,6 +51,8 @@ export default function InvoiceMatchHost({ onCollected, onRestored }: InvoiceMat
       setResult(null);
       setCollected([]);
       setFailedIds([]);
+      setNoteFor(null);
+      setSavedNotes([]);
       try {
         const r = await matchInvoice(po);
         setResult(r);
@@ -94,6 +103,26 @@ export default function InvoiceMatchHost({ onCollected, onRestored }: InvoiceMat
     onRestored();
   };
 
+  const saveNote = async (line: ReviewLine) => {
+    if (!noteText.trim()) {
+      setNoteError('Write the reason first.');
+      return;
+    }
+    setNoteBusy(true);
+    setNoteError('');
+    try {
+      await saveReviewNote(line, noteText);
+      setSavedNotes((prev) => [...prev, line.id]);
+      setNoteFor(null);
+      setNoteText('');
+    } catch (e) {
+      console.warn('[invoice-match] note failed for', line.id, e);
+      setNoteError('Could not save the note. Try again.');
+    } finally {
+      setNoteBusy(false);
+    }
+  };
+
   if (!open) return null;
 
   return (
@@ -153,6 +182,50 @@ export default function InvoiceMatchHost({ onCollected, onRestored }: InvoiceMat
                     <div className="min-w-0">
                       <p className="text-[14px] text-[#26251e] leading-snug break-words">{l.description}</p>
                       <p className="text-[12px] text-[rgba(38,37,30,0.7)] break-words">{l.reason}</p>
+                      {savedNotes.includes(l.id) ? (
+                        <p className="text-[12px] font-semibold text-[#125a3e] mt-1">Note saved</p>
+                      ) : noteFor === l.id ? (
+                        <div className="mt-2">
+                          <label htmlFor={`note-${l.id}`} className="block text-[12px] font-semibold text-[#26251e] mb-1">
+                            Ask the supplier why it differs, then write their answer. We can’t be invoiced for what we haven’t received.
+                          </label>
+                          <textarea
+                            id={`note-${l.id}`}
+                            value={noteText}
+                            onChange={(e) => setNoteText(e.target.value)}
+                            rows={3}
+                            className="w-full rounded-lg border border-[rgba(38,37,30,0.2)] bg-white p-2 text-[14px] text-[#26251e]"
+                            placeholder="Reason from the supplier…"
+                          />
+                          {noteError && <p className="text-[12px] text-[#cf2d56] mt-1">{noteError}</p>}
+                          <div className="flex gap-2 mt-2">
+                            <button
+                              type="button"
+                              disabled={noteBusy}
+                              onClick={() => void saveNote(l)}
+                              className="h-10 px-4 rounded-lg text-[13px] font-semibold bg-[#26251e] text-white disabled:opacity-60 touch-manipulation"
+                            >
+                              {noteBusy ? 'Saving…' : 'Save note'}
+                            </button>
+                            <button
+                              type="button"
+                              disabled={noteBusy}
+                              onClick={() => { setNoteFor(null); setNoteText(''); setNoteError(''); }}
+                              className="h-10 px-4 rounded-lg text-[13px] font-semibold bg-[#efeaf7] text-[#6c5a99] touch-manipulation"
+                            >
+                              Cancel
+                            </button>
+                          </div>
+                        </div>
+                      ) : (
+                        <button
+                          type="button"
+                          onClick={() => { setNoteFor(l.id); setNoteText(''); setNoteError(''); }}
+                          className="mt-1.5 h-9 px-3 rounded-lg text-[12px] font-semibold bg-[#efeaf7] text-[#6c5a99] touch-manipulation"
+                        >
+                          Add a note
+                        </button>
+                      )}
                     </div>
                   </li>
                 ))}
diff --git a/components/SupplierGroup.tsx b/components/SupplierGroup.tsx
index ce32b0b..17b1e11 100644
--- a/components/SupplierGroup.tsx
+++ b/components/SupplierGroup.tsx
@@ -296,6 +296,8 @@ export default function SupplierGroup({
   // activeTooltip above, this drives whether the section lifts to z-30
   // to paint above the next supplier/area group.
   const [childPopoverOpen, setChildPopoverOpen] = useState(false);
+  // Collect all is one tap that clears a whole PO, so it asks first.
+  const [confirmCollect, setConfirmCollect] = useState<{ poLabel: string; items: OrderItem[] } | null>(null);
   const listRef = useRef<HTMLUListElement>(null);
   // Row sheets close themselves (backdrop tap, Escape, the X button),
   // so there is no click-outside listener any more — it would have
@@ -455,7 +457,7 @@ export default function SupplierGroup({
                             {showBulk && (
                               <>
                                 <button
-                                  onClick={() => onBulkCollect?.(poLabel, po.items)}
+                                  onClick={() => setConfirmCollect({ poLabel, items: po.items })}
                                   aria-label={`Mark all ${po.items.length} items on ${poLabel} collected`}
                                   className="h-9 px-3 rounded-lg bg-[#1f8a65] text-white text-[13px] font-semibold flex items-center gap-1.5 active:bg-[#125a3e] transition-colors touch-manipulation"
                                 >
@@ -553,6 +555,38 @@ export default function SupplierGroup({
           )}
         </div>
       )}
+      {confirmCollect && (
+        <BottomSheet
+          title="Collect everything?"
+          subtitle={confirmCollect.poLabel}
+          onClose={() => setConfirmCollect(null)}
+        >
+          <p className="text-[15px] text-[#26251e] mb-4">
+            This marks all {confirmCollect.items.length} item{confirmCollect.items.length === 1 ? '' : 's'} on {confirmCollect.poLabel} as collected and removes them from your list.
+            Photograph the invoice first if you haven’t yet.
+          </p>
+          <div className="flex gap-2">
+            <button
+              type="button"
+              onClick={() => setConfirmCollect(null)}
+              className="h-12 flex-1 rounded-xl text-[15px] font-semibold bg-[#efeaf7] text-[#6c5a99] touch-manipulation"
+            >
+              No, go back
+            </button>
+            <button
+              type="button"
+              onClick={() => {
+                const c = confirmCollect;
+                setConfirmCollect(null);
+                onBulkCollect?.(c.poLabel, c.items);
+              }}
+              className="h-12 flex-1 rounded-xl text-[15px] font-semibold bg-[#1f8a65] text-white touch-manipulation"
+            >
+              Yes, collect all
+            </button>
+          </div>
+        </BottomSheet>
+      )}
     </section>
   );
 }
\ No newline at end of file
diff --git a/lib/invoiceCheck.ts b/lib/invoiceCheck.ts
index a2413b4..a631caa 100644
--- a/lib/invoiceCheck.ts
+++ b/lib/invoiceCheck.ts
@@ -77,3 +77,16 @@ export async function undoMatched(line: MatchedLine): Promise<void> {
     .collection(line.kind === 'stock' ? 'stock_purchase_items' : 'order_items')
     .update(line.id, line.previous);
 }
+
+/**
+ * Record why a line differs from the invoice. Only the note is written: the
+ * item is not collected and nothing else about it changes. Any earlier note
+ * on the line is kept.
+ */
+export async function saveReviewNote(line: ReviewLine, reason: string): Promise<void> {
+  const col = line.kind === 'stock' ? 'stock_purchase_items' : 'order_items';
+  const rec = await pb.collection(col).getOne(line.id);
+  const before = String(rec.notes ?? '').trim();
+  const entry = `[Invoice differs: ${line.reason}] ${reason.trim()}`;
+  await pb.collection(col).update(line.id, { notes: before ? `${before}\n${entry}` : entry });
+}