diff --git a/examples/chunked_output_benchmark.rb b/examples/chunked_output_benchmark.rb
index 3aa3a3659..237b1c91b 100644
--- a/examples/chunked_output_benchmark.rb
+++ b/examples/chunked_output_benchmark.rb
@@ -12,7 +12,7 @@ def main_loop
     if output[:current] < input[:limit]
       consumed = yield
       output[:current] += consumed
-      plan_event(nil)
+      plan_event(nil, untracked: true)
       suspend
     end
   end
diff --git a/examples/orchestrate.rb b/examples/orchestrate.rb
index fdb3a42c6..d37990211 100755
--- a/examples/orchestrate.rb
+++ b/examples/orchestrate.rb
@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
+require_relative 'example_helper'
+
 example_description = <<DESC
   Orchestrate Example
   ===================
@@ -21,8 +23,6 @@
 
 DESC
 
-require_relative 'example_helper'
-
 module Orchestrate
 
   class CreateInfrastructure < Dynflow::Action
diff --git a/examples/orchestrate_evented.rb b/examples/orchestrate_evented.rb
index 8df844dde..8b38f68e6 100755
--- a/examples/orchestrate_evented.rb
+++ b/examples/orchestrate_evented.rb
@@ -75,7 +75,7 @@ def run(event = nil)
                # do nothing
              end),
             (on nil do
-               suspend { |suspended_action| world.clock.ping suspended_action, rand(1), Finished }
+               suspend { |suspended_action| world.clock.ping suspended_action, rand(1), Finished, untracked: true }
              end))
     end
 
diff --git a/lib/dynflow/action.rb b/lib/dynflow/action.rb
index 7d02cd1bd..be1ec8f87 100644
--- a/lib/dynflow/action.rb
+++ b/lib/dynflow/action.rb
@@ -94,7 +94,8 @@ def to_s_humanized
               step_id:           Integer,
               event:             Object,
               time:              type { variants Time, NilClass },
-              optional:          Algebrick::Types::Boolean
+              optional:          Algebrick::Types::Boolean,
+              untracked:         Algebrick::Types::Boolean
     end
 
     def self.constantize(action_name)
@@ -343,9 +344,9 @@ def queue
 
     # Plan an +event+ to be send to the action defined by +action+, what defaults to be self.
     # if +time+ is not passed, event is sent as soon as possible.
-    def plan_event(event, time = nil, execution_plan_id: self.execution_plan_id, step_id: self.run_step_id, optional: false)
+    def plan_event(event, time = nil, execution_plan_id: self.execution_plan_id, step_id: self.run_step_id, optional: false, untracked: false)
       time = @world.clock.current_time + time if time.is_a?(Numeric)
-      delayed_events << DelayedEvent[execution_plan_id, step_id, event, time, optional]
+      delayed_events << DelayedEvent[execution_plan_id, step_id, event, time, optional, untracked]
     end
 
     def delayed_events
diff --git a/lib/dynflow/action/polling.rb b/lib/dynflow/action/polling.rb
index 2296644ff..a585f88f0 100644
--- a/lib/dynflow/action/polling.rb
+++ b/lib/dynflow/action/polling.rb
@@ -91,7 +91,7 @@ def resume_external_action
     end
 
     def suspend_and_ping
-      plan_event(Poll, poll_interval)
+      plan_event(Poll, poll_interval, untracked: true)
       suspend
     end
 
diff --git a/lib/dynflow/action/suspended.rb b/lib/dynflow/action/suspended.rb
index 03013d8e0..c39f65312 100644
--- a/lib/dynflow/action/suspended.rb
+++ b/lib/dynflow/action/suspended.rb
@@ -9,8 +9,8 @@ def initialize(action)
       @step_id           = action.run_step_id
     end
 
-    def plan_event(event, time, sent = Concurrent::Promises.resolvable_future, optional: false)
-      @world.plan_event(execution_plan_id, step_id, event, time, sent, optional: optional)
+    def plan_event(event, time, sent = Concurrent::Promises.resolvable_future, optional: false, untracked: false)
+      @world.plan_event(execution_plan_id, step_id, event, time, sent, optional: optional, untracked: untracked)
     end
 
     def event(event, sent = Concurrent::Promises.resolvable_future, optional: false)
diff --git a/lib/dynflow/action/timeouts.rb b/lib/dynflow/action/timeouts.rb
index 92033227b..98e9950d1 100644
--- a/lib/dynflow/action/timeouts.rb
+++ b/lib/dynflow/action/timeouts.rb
@@ -8,7 +8,7 @@ def process_timeout
     end
 
     def schedule_timeout(seconds, optional: false)
-      plan_event(Timeout, seconds, optional: optional)
+      plan_event(Timeout, seconds, optional: optional, untracked: true)
     end
  end
 end
diff --git a/lib/dynflow/action/with_bulk_sub_plans.rb b/lib/dynflow/action/with_bulk_sub_plans.rb
index 6cf23f75d..b90484d5e 100644
--- a/lib/dynflow/action/with_bulk_sub_plans.rb
+++ b/lib/dynflow/action/with_bulk_sub_plans.rb
@@ -70,7 +70,7 @@ def run_progress
     def spawn_plans
       super
     ensure
-      plan_event(PlanNextBatch)
+      plan_event(PlanNextBatch, untracked: true)
     end
 
     def cancel!(force = false)
diff --git a/lib/dynflow/action/with_polling_sub_plans.rb b/lib/dynflow/action/with_polling_sub_plans.rb
index 7b4d72ecc..7157e1e0d 100644
--- a/lib/dynflow/action/with_polling_sub_plans.rb
+++ b/lib/dynflow/action/with_polling_sub_plans.rb
@@ -70,5 +70,9 @@ def recalculate_counts
                     :failed_count  => failed - output.fetch(:resumed_count, 0),
                     :success_count => success)
     end
+
+    def can_fire_and_forget_sub_plans?
+      true
+    end
   end
 end
diff --git a/lib/dynflow/action/with_sub_plans.rb b/lib/dynflow/action/with_sub_plans.rb
index 3be37e69a..5e3d31451 100644
--- a/lib/dynflow/action/with_sub_plans.rb
+++ b/lib/dynflow/action/with_sub_plans.rb
@@ -81,7 +81,8 @@ def trigger(action_class, *args)
       if uses_concurrency_control
         trigger_with_concurrency_control(action_class, *args)
       else
-        world.trigger { world.plan_with_options(action_class: action_class, args: args, caller_action: self) }
+        method = can_fire_and_forget_sub_plans? ? :trigger_untracked : :trigger
+        world.public_send(:trigger) { world.plan_with_options(action_class: action_class, args: args, caller_action: self) }
       end
     end
 
@@ -234,5 +235,9 @@ def check_for_errors!
     def uses_concurrency_control
       @uses_concurrency_control = input.key? :concurrency_control
     end
+
+    def can_fire_and_forget_sub_plans?
+      false
+    end
   end
 end
diff --git a/lib/dynflow/clock.rb b/lib/dynflow/clock.rb
index 29ff6bd9a..3362c6450 100644
--- a/lib/dynflow/clock.rb
+++ b/lib/dynflow/clock.rb
@@ -114,11 +114,11 @@ def current_time
       Time.now
     end
 
-    def ping(who, time, with_what = nil, where = :<<, optional: false)
+    def ping(who, time, with_what = nil, where = :<<, optional: false, untracked: false)
       Type! time, Time, Numeric
       time  = current_time + time if time.is_a? Numeric
       if who.is_a?(Action::Suspended)
-        who.plan_event(with_what, time, optional: optional)
+        who.plan_event(with_what, time, optional: optional, untracked: untracked)
       else
         timer = Clock::Timer[who, time, with_what.nil? ? Algebrick::Types::None : Some[Object][with_what], where]
         self.tell([:add_timer, timer])
diff --git a/lib/dynflow/connectors/database.rb b/lib/dynflow/connectors/database.rb
index 0c231abbe..e4ddecfe2 100644
--- a/lib/dynflow/connectors/database.rb
+++ b/lib/dynflow/connectors/database.rb
@@ -127,7 +127,7 @@ def send_envelope(envelope)
         end
 
         def update_receiver_id(envelope, new_receiver_id)
-          Dispatcher::Envelope[envelope.request_id, envelope.sender_id, new_receiver_id, envelope.message]
+          Dispatcher::Envelope[envelope.request_id, envelope.sender_id, new_receiver_id, envelope.message, envelope.untracked]
         end
 
         def find_receiver(envelope)
diff --git a/lib/dynflow/director.rb b/lib/dynflow/director.rb
index 3fc735985..82676c3d4 100644
--- a/lib/dynflow/director.rb
+++ b/lib/dynflow/director.rb
@@ -11,7 +11,7 @@ class Director
     include Algebrick::TypeCheck
 
     Event = Algebrick.type do
-      fields! request_id:        String,
+      fields! request_id:        type { variants NilClass, String },
               execution_plan_id: String,
               step_id:           Integer,
               event:             Object,
diff --git a/lib/dynflow/dispatcher.rb b/lib/dynflow/dispatcher.rb
index dfea6e504..aef1771c4 100644
--- a/lib/dynflow/dispatcher.rb
+++ b/lib/dynflow/dispatcher.rb
@@ -40,10 +40,11 @@ module Dispatcher
     end
 
     Envelope = Algebrick.type do
-      fields! request_id: String,
+      fields! request_id: type { variants NilClass, String },
               sender_id: String,
               receiver_id: type { variants String, AnyExecutor = atom, UnknownWorld = atom },
-              message: type { variants Request, Response }
+              message: type { variants Request, Response },
+              untracked: type { variants TrueClass, FalseClass }
     end
 
     module Envelope
@@ -51,7 +52,8 @@ def build_response_envelope(response_message, sender)
         Envelope[self.request_id,
                  sender.id,
                  self.sender_id,
-                 response_message]
+                 response_message,
+                 false]
       end
     end
 
diff --git a/lib/dynflow/dispatcher/abstract.rb b/lib/dynflow/dispatcher/abstract.rb
index 0decdea45..5e89e8f85 100644
--- a/lib/dynflow/dispatcher/abstract.rb
+++ b/lib/dynflow/dispatcher/abstract.rb
@@ -7,6 +7,8 @@ def connector
       end
 
       def respond(request_envelope, response)
+        return if request_envelope.untracked
+
         response_envelope = request_envelope.build_response_envelope(response, @world)
         connector.send(response_envelope)
       end
diff --git a/lib/dynflow/dispatcher/client_dispatcher.rb b/lib/dynflow/dispatcher/client_dispatcher.rb
index fc436660f..8f1601728 100644
--- a/lib/dynflow/dispatcher/client_dispatcher.rb
+++ b/lib/dynflow/dispatcher/client_dispatcher.rb
@@ -4,8 +4,10 @@ module Dispatcher
     class ClientDispatcher < Abstract
 
       TrackedRequest = Algebrick.type do
-        fields! id: String, request: Request,
-                accepted: Concurrent::Promises::ResolvableFuture, finished: Concurrent::Promises::ResolvableFuture
+        fields! id: type { variants String, NilClass },
+                request: Request,
+                accepted: type { variants NilClass, Concurrent::Promises::ResolvableFuture },
+                finished: type { variants NilClass, Concurrent::Promises::ResolvableFuture }
       end
 
       module TrackedRequest
@@ -112,10 +114,10 @@ def initialize(world, ping_cache_age)
         @ping_cache       = PingCache.new world, ping_cache_age
       end
 
-      def publish_request(future, request, timeout)
+      def publish_request(future, request, timeout, untracked)
         with_ping_request_caching(request, future) do
-          track_request(future, request, timeout) do |tracked_request|
-            dispatch_request(request, @world.id, tracked_request.id)
+          track_request(future, request, timeout, untracked) do |tracked_request|
+            dispatch_request(request, @world.id, tracked_request.id, untracked)
           end
         end
       end
@@ -131,7 +133,7 @@ def start_termination(*args)
         finish_termination
       end
 
-      def dispatch_request(request, client_world_id, request_id)
+      def dispatch_request(request, client_world_id, request_id, untracked)
         ignore_unknown = false
         executor_id = match request,
                             (on ~Execution | ~Planning do |execution|
@@ -144,7 +146,7 @@ def dispatch_request(request, client_world_id, request_id)
                             (on Ping.(~any, ~any) | Status.(~any, ~any) do |receiver_id, _|
                                receiver_id
                              end)
-        envelope = Envelope[request_id, client_world_id, executor_id, request]
+        envelope = Envelope[request_id, client_world_id, executor_id, request, untracked]
         if Dispatcher::UnknownWorld === envelope.receiver_id
           raise Dynflow::Error, "Could not find an executor for #{envelope}" unless ignore_unknown
 
@@ -203,9 +205,15 @@ def find_executor(execution_plan_id)
         Dispatcher::UnknownWorld
       end
 
-      def track_request(finished, request, timeout)
+      def track_request(finished, request, timeout, untracked)
         id_suffix = @last_id_suffix += 1
         id = "#{@world.id}-#{id_suffix}"
+
+        if untracked
+          yield TrackedRequest[id, request, nil, finished]
+          return
+        end
+
         tracked_request = TrackedRequest[id, request, Concurrent::Promises.resolvable_future, finished]
         @tracked_requests[id] = tracked_request
         @world.clock.ping(self, timeout, [:timeout, id]) if timeout
diff --git a/lib/dynflow/executors/abstract/core.rb b/lib/dynflow/executors/abstract/core.rb
index cbac0568d..e56416c4c 100644
--- a/lib/dynflow/executors/abstract/core.rb
+++ b/lib/dynflow/executors/abstract/core.rb
@@ -46,7 +46,7 @@ def handle_planning(execution_plan_id)
 
         def plan_events(delayed_events)
           delayed_events.each do |event|
-            @world.plan_event(event.execution_plan_id, event.step_id, event.event, event.time, optional: event.optional)
+            @world.plan_event(event.execution_plan_id, event.step_id, event.event, event.time, optional: event.optional, untracked: event.untracked)
           end
         end
 
diff --git a/lib/dynflow/testing/in_thread_executor.rb b/lib/dynflow/testing/in_thread_executor.rb
index e73a7c4c1..bcdfca9a5 100644
--- a/lib/dynflow/testing/in_thread_executor.rb
+++ b/lib/dynflow/testing/in_thread_executor.rb
@@ -23,7 +23,7 @@ def process_work_items
 
       def plan_events(delayed_events)
         delayed_events.each do |event|
-          @world.plan_event(event.execution_plan_id, event.step_id, event.event, event.time)
+          @world.plan_event(event.execution_plan_id, event.step_id, event.event, event.time, optional: event.optional, untracked: event.untracked)
         end
       end
 
diff --git a/lib/dynflow/world.rb b/lib/dynflow/world.rb
index d18458999..9400dbc75 100644
--- a/lib/dynflow/world.rb
+++ b/lib/dynflow/world.rb
@@ -189,6 +189,23 @@ def trigger(action_class = nil, *args, &block)
       end
     end
 
+    def trigger_untracked(action_class = nil, *args, &block)
+      if action_class.nil?
+        raise 'Neither action_class nor a block given' if block.nil?
+        execution_plan = block.call(self)
+      else
+        execution_plan = plan(action_class, *args)
+      end
+      planned = execution_plan.state == :planned
+
+      if planned
+        done = execute(execution_plan.id, Concurrent::Promises.resolvable_future, untracked: true)
+        Scheduled[execution_plan.id]
+      else
+        PlaningFailed[execution_plan.id, execution_plan.errors.first.exception]
+      end
+    end
+
     def delay(action_class, delay_options, *args)
       delay_with_options(action_class: action_class, args: args, delay_options: delay_options)
     end
@@ -223,16 +240,16 @@ def plan_with_options(action_class:, args:, id: nil, caller_action: nil)
 
     # @return [Concurrent::Promises::ResolvableFuture] containing execution_plan when finished
     # raises when ExecutionPlan is not accepted for execution
-    def execute(execution_plan_id, done = Concurrent::Promises.resolvable_future)
-      publish_request(Dispatcher::Execution[execution_plan_id], done, true)
+    def execute(execution_plan_id, done = Concurrent::Promises.resolvable_future, untracked: false)
+      publish_request(Dispatcher::Execution[execution_plan_id], done, true, untracked: untracked)
     end
 
     def event(execution_plan_id, step_id, event, done = Concurrent::Promises.resolvable_future, optional: false)
       publish_request(Dispatcher::Event[execution_plan_id, step_id, event, nil, optional], done, false)
     end
 
-    def plan_event(execution_plan_id, step_id, event, time, accepted = Concurrent::Promises.resolvable_future, optional: false)
-      publish_request(Dispatcher::Event[execution_plan_id, step_id, event, time, optional], accepted, false)
+    def plan_event(execution_plan_id, step_id, event, time, accepted = Concurrent::Promises.resolvable_future, optional: false, untracked: false)
+      publish_request(Dispatcher::Event[execution_plan_id, step_id, event, time, optional], accepted, false, untracked: untracked)
     end
 
     def plan_request(execution_plan_id, done = Concurrent::Promises.resolvable_future)
@@ -251,12 +268,12 @@ def get_execution_status(world_id, execution_plan_id, timeout, done = Concurrent
       publish_request(Dispatcher::Status[world_id, execution_plan_id], done, false, timeout)
     end
 
-    def publish_request(request, done, wait_for_accepted, timeout = nil)
+    def publish_request(request, done, wait_for_accepted, timeout = nil, untracked: false)
       accepted = Concurrent::Promises.resolvable_future
       accepted.rescue do |reason|
         done.reject reason if reason
       end
-      client_dispatcher.ask([:publish_request, done, request, timeout], accepted)
+      client_dispatcher.ask([:publish_request, done, request, timeout, untracked], accepted)
       accepted.wait if wait_for_accepted
       done
     rescue => e
diff --git a/lib/dynflow/world/invalidation.rb b/lib/dynflow/world/invalidation.rb
index 7e1234b9a..898e6eb83 100644
--- a/lib/dynflow/world/invalidation.rb
+++ b/lib/dynflow/world/invalidation.rb
@@ -71,7 +71,8 @@ def invalidate_execution_lock(execution_lock)
               client_dispatcher.tell([:dispatch_request,
                                       Dispatcher::Execution[execution_lock.execution_plan_id],
                                       execution_lock.client_world_id,
-                                      execution_lock.request_id])
+                                      execution_lock.request_id,
+                                      true])
             end
           end
         end