diff --git a/controllers/ledger_entries_controller.php b/controllers/ledger_entries_controller.php
index 25cd6f6..6675547 100644
--- a/controllers/ledger_entries_controller.php
+++ b/controllers/ledger_entries_controller.php
@@ -266,6 +266,18 @@ class LedgerEntriesController extends AppController {
   }
 
 
+  /**************************************************************************
+   **************************************************************************
+   **************************************************************************
+   * action: reverse the ledger entry
+   */
+
+  function reverse($id) {
+    $id = $this->LedgerEntry->reverse($id);
+    $this->redirect(array('action'=>'view', $id));
+  }
+
+
   /**************************************************************************
    **************************************************************************
    **************************************************************************
@@ -342,6 +354,27 @@ class LedgerEntriesController extends AppController {
     $reconciled = $this->LedgerEntry->findReconciledLedgerEntries($id);
     //pr($reconciled);
 
+
+    // REVISIT <AP>: 20090711
+    //  It's not clear whether we should be able to reverse charges that have
+    //  already been paid/cleared/reconciled.  Certainly, that will be the
+    //  case when someone has pre-paid and then moves out early.  However, this
+    //  will work well for items accidentally charged but not yet paid for.
+    if ((!$entry['DebitLedger']['Account']['trackable'] ||
+	 $stats['debit']['amount_reconciled'] == 0) &&
+	(!$entry['CreditLedger']['Account']['trackable'] ||
+	 $stats['credit']['amount_reconciled'] == 0))
+      {
+	// Set up dynamic menu items
+	$this->sidemenu_links[] =
+	  array('name' => 'Operations', 'header' => true);
+
+	$this->sidemenu_links[] =
+	  array('name' => 'Reverse',
+		'url' => array('action' => 'reverse',
+			       $id));
+      }
+
     // Prepare to render.
     $title = "Double Ledger Entry #{$entry['LedgerEntry']['id']}";
     $this->set(compact('entry', 'title', 'reconciled', 'stats'));