diff --git a/bin/ngcp-create-subscriber b/bin/ngcp-create-subscriber
index 418cf20..359f8db 100755
--- a/bin/ngcp-create-subscriber
+++ b/bin/ngcp-create-subscriber
@@ -69,7 +69,7 @@ sub main {
             $data{domain_id} = $tmp->{id};
         }
     } else {
-        usage("Domain not found");
+        die "Domain $opts->{domain} not found\n";
     }
     my $res = $client->request("POST", $uri, \%data);
     print $res->result."\n";
diff --git a/bin/ngcp-delete-domain b/bin/ngcp-delete-domain
index 57e2821..61ef76f 100755
--- a/bin/ngcp-delete-domain
+++ b/bin/ngcp-delete-domain
@@ -62,10 +62,10 @@ sub main {
         } else {
             $dom_id = $tmp->{id};
         }
-        usage("Domain not found") unless $dom_id;
+        die "Domain $opts->{domain} not found\n" unless $dom_id;
         $uri .= $dom_id;
     } else {
-        usage("Domain not found");
+        die "Domain $opts->{domain} not found\n";
     }
     my $res = $client->request("DELETE", $uri, \%data);
     print $res->result."\n";
diff --git a/bin/ngcp-terminate-subscriber b/bin/ngcp-terminate-subscriber
index 0978167..9893b07 100755
--- a/bin/ngcp-terminate-subscriber
+++ b/bin/ngcp-terminate-subscriber
@@ -57,9 +57,9 @@ sub main {
         } else {
             $sub_id = $tmp->{id};
         }
-        usage("Wrong subscriber id found") unless $sub_id =~ /^\d$/;
+        die "Wrong subscriber id $sub_id found\n" unless $sub_id =~ /^\d$/;
     } else {
-        usage("Subscriber not found");
+        die "Subscriber $opts->{username}\@$opts->{domain} not found\n";
     }
     $uri = '/api/subscribers/'.$sub_id;
     my $data = [ { op => 'replace',