diff --git a/src/warden-client/doc/README b/src/warden-client/doc/README
index 038a9a3da8c4a2a8427ac97c1da33f719110fb0d..21eb78eadb350e1fa915a6fc046b4f8fac0df921 100644
--- a/src/warden-client/doc/README
+++ b/src/warden-client/doc/README
@@ -285,7 +285,10 @@ G. Registration
     of requested events, receiving of own events, description tags and CIDR
     this client is allowed to communicate from.
   
-    Hostname  hostname of client to be registered
+    Hostname                  Hostname of client to be registered
+
+    Requestor                 E-mail address of organization or authorized person
+                              who demands new client registration.
 
     Service name              Text string. Unique name of the service the client
                               is integrated in.
diff --git a/src/warden-client/doc/README.cesnet b/src/warden-client/doc/README.cesnet
index 52cb24b056b5d4c1e82bdcf520127eaf90a8bafc..e18a83fbfc0c39e7ca1c1d4a23598f8a018cd89a 100644
--- a/src/warden-client/doc/README.cesnet
+++ b/src/warden-client/doc/README.cesnet
@@ -37,6 +37,8 @@ B. Registration
 
     * For sender client:
       - hostname of the machine, where client runs,
+      - e-mail address of organization or authorized person who demands
+        new client registration,
       - client type = sender,
       - name of the detection service (for example 'ScanDetector'),
       - description tags of sent events (see below)
@@ -44,6 +46,8 @@ B. Registration
 
     * For receiver client:
       - hostname of the machine, where client runs,
+      - e-mail address of organization or authorized person who demands
+        new client registration,
       - client type = receiver,
       - whether client should receive all events, or type of requested
         events (for example 'portscan', see below) otherwise
diff --git a/src/warden-server/doc/README b/src/warden-server/doc/README
index e37150649caa08ab82c1b825b8b9ce3c54f601f8..4ca5483ef3a7973346cd25a8f4579e5268bdc505 100644
--- a/src/warden-server/doc/README
+++ b/src/warden-server/doc/README
@@ -312,8 +312,8 @@ G. Registration of Clients
     successfully:
 
     hostname           - hostname of the client,
-    requestor          - organization or authorized person who demands new
-                         client registration,
+    requestor          - e-mail address of organization or authorized person
+                         who demands new client registration,
     type               - the type of events the client wish to receive or '_any_'
                          for receiving of all types of events,
     receive_own_events - boolean value describing if events originating from