diff --git a/lib/NGCP/Panel/Controller/API/Root.pm b/lib/NGCP/Panel/Controller/API/Root.pm
index 00091997db..963a50d4eb 100644
--- a/lib/NGCP/Panel/Controller/API/Root.pm
+++ b/lib/NGCP/Panel/Controller/API/Root.pm
@@ -363,7 +363,7 @@ sub get_field_poperties :Private{
     unless (defined $desc && length($desc) > 0) {
         $desc = 'to be described ...';
     }
-    return { name => $name, description => $desc, types => \@types, type_original => $field->type };
+    return { name => $name, description => $desc, types => \@types, type_original => $field->type, readonly => $field->readonly };
 }
 sub get_collection_properties {
     my ($self, $form) = @_;
diff --git a/lib/NGCP/Panel/Form/CFDestinationSetAPI.pm b/lib/NGCP/Panel/Form/CFDestinationSetAPI.pm
index 7b8093beda..dd408324da 100644
--- a/lib/NGCP/Panel/Form/CFDestinationSetAPI.pm
+++ b/lib/NGCP/Panel/Form/CFDestinationSetAPI.pm
@@ -54,6 +54,7 @@ has_field 'destinations.destination' => (
 has_field 'destinations.simple_destination' => (
     type => 'Text',
     label => 'A simple destination format, e.g. "4312345" if it is a number, or "user@domain" if it is a URI.',
+    readonly => 1,
 );
 
 has_field 'destinations.timeout' => (
diff --git a/lib/NGCP/Panel/Form/Contract/CustomerAPI.pm b/lib/NGCP/Panel/Form/Contract/CustomerAPI.pm
index cc1e7c39c2..0be84c78c0 100644
--- a/lib/NGCP/Panel/Form/Contract/CustomerAPI.pm
+++ b/lib/NGCP/Panel/Form/Contract/CustomerAPI.pm
@@ -116,7 +116,7 @@ has_field 'create_timestamp' => (
     readonly => 1,
     element_attr => {
         rel => ['tooltip'],
-        title => ['Readonly. The datetime (YYYY-MM-DD HH:mm:ss) of the creation.']
+        title => ['The datetime (YYYY-MM-DD HH:mm:ss) of the creation.']
     },
 );
 
@@ -126,7 +126,7 @@ has_field 'activate_timestamp' => (
     readonly => 1,
     element_attr => {
         rel => ['tooltip'],
-        title => ['Readonly. The datetime (YYYY-MM-DD HH:mm:ss) of the activation.']
+        title => ['The datetime (YYYY-MM-DD HH:mm:ss) of the activation.']
     },
 );
 
@@ -136,7 +136,7 @@ has_field 'modify_timestamp' => (
     readonly => 1,
     element_attr => {
         rel => ['tooltip'],
-        title => ['Readonly. The datetime (YYYY-MM-DD HH:mm:ss) of the modification.']
+        title => ['The datetime (YYYY-MM-DD HH:mm:ss) of the modification.']
     },
 );
 
@@ -146,7 +146,7 @@ has_field 'terminate_timestamp' => (
     readonly => 1,
     element_attr => {
         rel => ['tooltip'],
-        title => ['Readonly. The datetime (YYYY-MM-DD HH:mm:ss) of the termination.']
+        title => ['The datetime (YYYY-MM-DD HH:mm:ss) of the termination.']
     },
 );
 
diff --git a/share/templates/api/root/collection.tt b/share/templates/api/root/collection.tt
index bd1a14e868..62e08036f3 100644
--- a/share/templates/api/root/collection.tt
+++ b/share/templates/api/root/collection.tt
@@ -92,7 +92,7 @@ See description how to obtain properties, if any.
 [% ELSE -%]
 <ul id="[% id %]-props">
 [% FOREACH f IN col.fields -%]
-    <li><b>[% f.name %] </b>(<i>[% f.types.join(', ') %]</i>): [% f.description %]</li>
+    <li><b>[% f.name %] </b>(<i>[% f.types.join(', ') %]</i>): [%IF f.readonly %]<b>Readonly</b>. [%END%][% f.description %]</li>
 [% END -%]
 </ul>
 [% END -%]