diff --git a/HISTORY b/HISTORY
index f54c33bd..79e08d8e 100644
--- a/HISTORY
+++ b/HISTORY
@@ -8,7 +8,9 @@
         repmgr: report error code on follow/rejoin failure due to non-available
           replication slot (Ian)
         repmgr: ensure "node rejoin" checks for available replication slots (Ian)
-        repmgr: improve "standby switchover" completion checks
+        repmgr: improve "standby switchover" completion checks (Ian)
+        repmgr: add replication configuration file ownership check to
+          "standby switchover" (Ian)
 
 5.0     2019-10-15
         general: add PostgreSQL 12 support (Ian)
diff --git a/doc/appendix-release-notes.xml b/doc/appendix-release-notes.xml
index 1fea8d54..6ce2a376 100644
--- a/doc/appendix-release-notes.xml
+++ b/doc/appendix-release-notes.xml
@@ -19,7 +19,7 @@
 
   <sect1 id="release-5.1.0">
     <title>Release 5.1.0</title>
-    <para><emphasis>?? ?? ??, 20??</emphasis></para>
+    <para><emphasis>?? ?? ??, 2020</emphasis></para>
 
     <para>
       &repmgr; 5.1.0 is a major release.
@@ -55,6 +55,15 @@
               Improve logging and checking of potential failure situations.
             </para>
           </listitem>
+          <listitem>
+            <para>
+              <link linkend="repmgr-standby-switchover"><command>repmgr standby switchover</command></link>:
+              Replication configuration files (PostgreSQL 11 and earlier:
+              <filename>recovery.conf</filename>; PostgreSQL 12 and later: <filename>postgresql.auto.conf</filename>)
+              will be checked to ensure they are owned by the same user who owns the PostgreSQL
+              data directory.
+            </para>
+          </listitem>
         </itemizedlist>
       </para>
     </sect2>