diff --git a/lib/NGCP/Panel/Controller/API/SubscribersItem.pm b/lib/NGCP/Panel/Controller/API/SubscribersItem.pm
index 316864d137..9c3f0a83c5 100644
--- a/lib/NGCP/Panel/Controller/API/SubscribersItem.pm
+++ b/lib/NGCP/Panel/Controller/API/SubscribersItem.pm
@@ -167,6 +167,21 @@ sub DELETE :Allow {
     {
         my $subscriber = $self->item_by_id($c, $id);
         last unless $self->resource_exists($c, subscriber => $subscriber);
+
+        if ($subscriber->contract->product->class eq "pbxaccount" && $subscriber->provisioning_voip_subscriber->is_pbx_pilot) {
+            my $other_subscriber = $c->model('DB')->resultset('voip_subscribers')->search({
+                                        contract_id => $subscriber->contract->id,
+                                        status => { '!=' => 'terminated' },
+                                        'provisioning_voip_subscriber.is_pbx_pilot' => 0,
+                                    }, {
+                                        join => 'provisioning_voip_subscriber',
+                                    })->first();
+            if ($other_subscriber) {
+                $self->error($c, HTTP_FORBIDDEN, "Cannot terminate pilot subscriber when other subscribers exists");
+                return;
+            }
+        }
+
         if($c->user->roles eq "subscriberadmin") {
 
             my $prov_sub = $subscriber->provisioning_voip_subscriber;
diff --git a/lib/NGCP/Panel/Controller/Subscriber.pm b/lib/NGCP/Panel/Controller/Subscriber.pm
index a92c48e0ca..c36c988b0a 100644
--- a/lib/NGCP/Panel/Controller/Subscriber.pm
+++ b/lib/NGCP/Panel/Controller/Subscriber.pm
@@ -370,6 +370,24 @@ sub terminate :Chained('base') :PathPart('terminate') :Args(0) :Does(ACL) :ACLDe
     my ($self, $c) = @_;
     my $subscriber = $c->stash->{subscriber};
 
+    if ($subscriber->contract->product->class eq "pbxaccount" && $c->stash->{subscriber}->provisioning_voip_subscriber->is_pbx_pilot) {
+        my $other_subscriber = $c->model('DB')->resultset('voip_subscribers')->search({
+                                    contract_id => $c->stash->{contract}->id,
+                                    status => { '!=' => 'terminated' },
+                                    'provisioning_voip_subscriber.is_pbx_pilot' => 0,
+                                }, {
+                                    join => 'provisioning_voip_subscriber',
+                                })->first();
+        if ($other_subscriber) {
+            NGCP::Panel::Utils::Message::error(
+                c     => $c,
+                error => 'forbidden termination of pilot subscriber for uuid '.$c->qs($subscriber->uuid),
+                desc  => $c->loc('Terminating pilot subscriber when other subscribers exist is prohibited.'),
+            );
+            NGCP::Panel::Utils::Navigation::back_or($c, $c->uri_for('/subscriber'));
+        }
+    }
+
     if($c->user->roles eq 'subscriberadmin' && $c->user->uuid eq $subscriber->uuid) {
         NGCP::Panel::Utils::Message::error(
             c     => $c,