diff --git a/lib/NGCP/Panel/Form/CFSourceSetAPI.pm b/lib/NGCP/Panel/Form/CFSourceSetAPI.pm
index e983ea5fc8..5b352fdfe1 100644
--- a/lib/NGCP/Panel/Form/CFSourceSetAPI.pm
+++ b/lib/NGCP/Panel/Form/CFSourceSetAPI.pm
@@ -33,8 +33,11 @@ has_field 'sources' => (
         rel => ['tooltip'],
         title => ['An array of sources, each containing the key "source" ' .
                   'which will be matched against the call\'s anumber to determine ' .
-                  'whether to apply the callforward or not.',
-        ]
+                  'whether to apply the callforward or not. ' .
+                  '"source" is the calling party number in E164 format to match. ' .
+                  'Shell patterns like 431* or 49123[1-5]67 are possible. ' .
+                  'Use "anonymous" to match suppressed numbers.',
+        ],
     },
 );
 
diff --git a/lib/NGCP/Panel/Form/CallforwardSourceSet.pm b/lib/NGCP/Panel/Form/CallforwardSourceSet.pm
index b393042040..5c0f3c6a6f 100644
--- a/lib/NGCP/Panel/Form/CallforwardSourceSet.pm
+++ b/lib/NGCP/Panel/Form/CallforwardSourceSet.pm
@@ -15,6 +15,10 @@ has_field 'name' => (
     label => 'Name',
     wrapper_class => [qw/hfh-rep-field/],
     required => 1,
+    element_attr => {
+        rel => ['tooltip'],
+        title => ['The unique name of the source set. Arbitrary text'],
+    },
 );
 
 has_field 'source' => (
@@ -39,6 +43,11 @@ has_field 'source.source' => (
     required => 1,
     do_label => 1,
     wrapper_class => [qw/hfh-rep-field/],
+    element_attr => {
+        rel => ['tooltip'],
+        title => ['The calling party number in E164 format to match. Shell patterns like 431* or 49123~~~[1-5~~~]67 are possible. ' .
+            'Use "anonymous" to match suppressed numbers.'],
+    },
 );
 
 has_field 'source.rm' => (