diff --git a/changelog.d/fix-duplicate-inbox-deliveries.fix b/changelog.d/fix-duplicate-inbox-deliveries.fix
new file mode 100644
index 000000000..e69de29bb
diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
index cc47b3d27..fb7c6f005 100644
--- a/lib/pleroma/web/activity_pub/publisher.ex
+++ b/lib/pleroma/web/activity_pub/publisher.ex
@@ -255,7 +255,10 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       [priority_recipients, recipients]
       |> Enum.map(fn recipients ->
         recipients
-        |> Enum.map(fn actor -> actor.inbox end)
+        |> Enum.map(fn %User{} = user ->
+          determine_inbox(activity, user)
+        end)
+        |> Enum.uniq()
         |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
         |> Instances.filter_reachable()
       end)
@@ -302,7 +305,10 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       recipients(actor, activity)
       |> Enum.map(fn recipients ->
         recipients
-        |> Enum.map(fn actor -> actor.inbox end)
+        |> Enum.map(fn %User{} = user ->
+          determine_inbox(activity, user)
+        end)
+        |> Enum.uniq()
         |> Enum.filter(fn inbox -> should_federate?(inbox, public) end)
       end)
 
diff --git a/test/pleroma/web/federator_test.exs b/test/pleroma/web/federator_test.exs
index 6826e6c2f..4a398f239 100644
--- a/test/pleroma/web/federator_test.exs
+++ b/test/pleroma/web/federator_test.exs
@@ -40,6 +40,44 @@ defmodule Pleroma.Web.FederatorTest do
       %{activity: activity, relay_mock: relay_mock}
     end
 
+    test "to shared inbox when multiple actors from same instance are recipients" do
+      user = insert(:user)
+
+      shared_inbox = "https://domain.com/inbox"
+
+      follower_one =
+        insert(:user, %{
+          local: false,
+          nickname: "nick1@domain.com",
+          ap_id: "https://domain.com/users/nick1",
+          inbox: "https://domain.com/users/nick1/inbox",
+          shared_inbox: shared_inbox
+        })
+
+      follower_two =
+        insert(:user, %{
+          local: false,
+          nickname: "nick2@domain.com",
+          ap_id: "https://domain.com/users/nick2",
+          inbox: "https://domain.com/users/nick2/inbox",
+          shared_inbox: shared_inbox
+        })
+
+      {:ok, _, _} = Pleroma.User.follow(follower_one, user)
+      {:ok, _, _} = Pleroma.User.follow(follower_two, user)
+
+      {:ok, _activity} = CommonAPI.post(user, %{status: "Happy Friday everyone!"})
+
+      ObanHelpers.perform(all_enqueued(worker: PublisherWorker))
+
+      inboxes =
+        all_enqueued(worker: PublisherWorker)
+        |> Enum.filter(&(get_in(&1, [Access.key(:args), Access.key("op")]) == "publish_one"))
+        |> Enum.map(&get_in(&1, [Access.key(:args), Access.key("params"), Access.key("inbox")]))
+
+      assert [shared_inbox] == inboxes
+    end
+
     test "with relays active, it publishes to the relay", %{
       activity: activity,
       relay_mock: relay_mock