diff --git a/lib/who_need_help_web/controllers/user_registration_controller.ex b/lib/who_need_help_web/controllers/user_registration_controller.ex
index 6a415cc..f32c2fa 100644
--- a/lib/who_need_help_web/controllers/user_registration_controller.ex
+++ b/lib/who_need_help_web/controllers/user_registration_controller.ex
@@ -14,8 +14,9 @@ defmodule WhoNeedHelpWeb.UserRegistrationController do
     render_registration(conn, changeset)
   end
 
-  def sent(conn, _params) do
-    render(conn, :sent)
+  def sent(conn, params) do
+    email_flow = if params["flow"] == "register", do: "register", else: "login"
+    render(conn, :sent, email_flow: email_flow)
   end
 
   def create(conn, %{"user" => user_params}) when is_map(user_params) do
@@ -112,7 +113,7 @@ defmodule WhoNeedHelpWeb.UserRegistrationController do
         "If this address can be registered or signed in, login instructions will arrive shortly."
       )
     )
-    |> redirect(to: ~p"/users/check-email")
+    |> redirect(to: ~p"/users/check-email?flow=register")
   end
 
   defp unique_email_error?(%Ecto.Changeset{} = changeset) do
diff --git a/lib/who_need_help_web/controllers/user_registration_html/sent.html.heex b/lib/who_need_help_web/controllers/user_registration_html/sent.html.heex
index 756ec60..77e8030 100644
--- a/lib/who_need_help_web/controllers/user_registration_html/sent.html.heex
+++ b/lib/who_need_help_web/controllers/user_registration_html/sent.html.heex
@@ -1,47 +1,83 @@
-<.header>
-  {gettext("Check your email")}
-  <:subtitle>
-    {gettext("If the address can be used, a secure link will arrive shortly.")}
-  </:subtitle>
-</.header>
-
-<div class="mx-auto mt-8 max-w-xl rounded-3xl border border-base-300 bg-base-100 p-6 shadow-sm sm:p-8">
-  <div role="status" class="alert alert-success items-start">
-    <.icon name="hero-check-circle" class="mt-0.5 size-6 shrink-0" />
-    <div>
-      <h2 class="font-bold">{gettext("Request accepted")}</h2>
-      <p class="mt-1 text-sm">
-        {gettext("The site processed your request. Follow the email instructions if they arrive.")}
-      </p>
+<Layouts.app flash={@flash} current_scope={@current_scope}>
+  <div class="mx-auto max-w-xl space-y-6">
+    <div class="text-center">
+      <.header>
+        {if @email_flow == "register",
+          do: gettext("Check your email to finish registration"),
+          else: gettext("Sign-in request processed")}
+        <:subtitle>
+          <%= if @email_flow == "register" do %>
+            {gettext("Use the newest confirmation link if it arrives.")}
+          <% else %>
+            {gettext("Signing in does not create a new account.")}
+          <% end %>
+        </:subtitle>
+      </.header>
     </div>
-  </div>
 
-  <div class="mt-6 flex gap-4">
-    <div class="grid size-11 shrink-0 place-items-center rounded-full bg-success/15 text-success">
-      <.icon name="hero-envelope" class="size-6" />
-    </div>
-    <div>
-      <h2 class="text-lg font-bold">{gettext("Open the newest Who Need Help email")}</h2>
-      <p class="mt-2 text-sm leading-6 text-base-content/70">
+    <div class="rounded-3xl border border-base-300 bg-base-100 p-6 shadow-sm sm:p-8">
+      <div role="status" class="alert alert-success items-start">
+        <.icon name="hero-check-circle" class="mt-0.5 size-6 shrink-0" />
+        <div>
+          <h2 class="font-bold">
+            {if @email_flow == "register",
+              do: gettext("Registration request accepted"),
+              else: gettext("Sign-in request accepted")}
+          </h2>
+          <p class="mt-1 text-sm">
+            <%= if @email_flow == "register" do %>
+              {gettext("The site processed your registration request.")}
+            <% else %>
+              {gettext(
+                "If this email belongs to an existing account, a secure sign-in link will arrive shortly."
+              )}
+            <% end %>
+          </p>
+        </div>
+      </div>
+
+      <div class="mt-6 flex gap-4">
+        <div class="grid size-11 shrink-0 place-items-center rounded-full bg-success/15 text-success">
+          <.icon name="hero-envelope" class="size-6" />
+        </div>
+        <div>
+          <h2 class="text-lg font-bold">
+            <%= if @email_flow == "register" do %>
+              {gettext("Open the newest Who Need Help email")}
+            <% else %>
+              {gettext("Already registered? Check your email")}
+            <% end %>
+          </h2>
+          <p class="mt-2 text-sm leading-6 text-base-content/70">
+            <%= if @email_flow == "register" do %>
+              {gettext(
+                "Use the confirmation link in the message. You do not need to enter your address again on this site."
+              )}
+            <% else %>
+              {gettext(
+                "For privacy, this page cannot reveal whether an account exists. If you are new to Who Need Help, choose Register instead."
+              )}
+            <% end %>
+          </p>
+        </div>
+      </div>
+
+      <div class="mt-6 rounded-2xl bg-base-200 p-4 text-sm leading-6 text-base-content/70">
         {gettext(
-          "If a message arrives, use the secure link in it. You do not need to enter your address again on this site."
+          "If the message is not in your inbox after a minute, check Spam. Older secure links may have been replaced by the newest one."
         )}
-      </p>
+      </div>
+
+      <div class="mt-6 grid gap-3 sm:grid-cols-2">
+        <.link navigate={~p"/users/log-in"} class="btn btn-primary">
+          {gettext("Back to log in")}
+        </.link>
+        <.link navigate={~p"/users/register"} class="btn btn-outline">
+          {if @email_flow == "register",
+            do: gettext("Use another email"),
+            else: gettext("Register instead")}
+        </.link>
+      </div>
     </div>
   </div>
-
-  <div class="mt-6 rounded-2xl bg-base-200 p-4 text-sm leading-6 text-base-content/70">
-    {gettext(
-      "If the message is not in your inbox after a minute, check Spam. Older confirmation links may have been replaced by the newest one."
-    )}
-  </div>
-
-  <div class="mt-6 grid gap-3 sm:grid-cols-2">
-    <.link navigate={~p"/users/log-in"} class="btn btn-primary">
-      {gettext("Back to log in")}
-    </.link>
-    <.link navigate={~p"/users/register"} class="btn btn-outline">
-      {gettext("Register instead")}
-    </.link>
-  </div>
-</div>
+</Layouts.app>
diff --git a/lib/who_need_help_web/controllers/user_session_controller.ex b/lib/who_need_help_web/controllers/user_session_controller.ex
index 6d37009..58ee43b 100644
--- a/lib/who_need_help_web/controllers/user_session_controller.ex
+++ b/lib/who_need_help_web/controllers/user_session_controller.ex
@@ -100,7 +100,7 @@ defmodule WhoNeedHelpWeb.UserSessionController do
 
         conn
         |> put_flash(:info, info)
-        |> redirect(to: ~p"/users/check-email")
+        |> redirect(to: ~p"/users/check-email?flow=login")
 
       {:error, :rate_limited} ->
         conn
diff --git a/test/who_need_help_web/controllers/user_registration_controller_test.exs b/test/who_need_help_web/controllers/user_registration_controller_test.exs
index ad6d74f..ce124b3 100644
--- a/test/who_need_help_web/controllers/user_registration_controller_test.exs
+++ b/test/who_need_help_web/controllers/user_registration_controller_test.exs
@@ -30,18 +30,28 @@ defmodule WhoNeedHelpWeb.UserRegistrationControllerTest do
 
   describe "GET /users/check-email" do
     test "explains that the confirmation continues from the email", %{conn: conn} do
-      conn = get(conn, ~p"/users/check-email")
+      conn = get(conn, ~p"/users/check-email?flow=login")
       response = html_response(conn, 200)
 
       assert get_resp_header(conn, "cache-control") == ["no-store"]
-      assert response =~ "Check your email"
-      assert response =~ "Request accepted"
+      assert response =~ "Sign-in request processed"
+      assert response =~ "Signing in does not create a new account"
+      assert response =~ "Sign-in request accepted"
+      assert response =~ "cannot reveal whether an account exists"
       assert response =~ ~s(role="status")
-      assert response =~ "You do not need to enter your address again"
       assert response =~ "check Spam"
       assert response =~ ~p"/users/log-in"
       assert response =~ ~p"/users/register"
     end
+
+    test "renders registration-specific guidance", %{conn: conn} do
+      response = conn |> get(~p"/users/check-email?flow=register") |> html_response(200)
+
+      assert response =~ "Check your email to finish registration"
+      assert response =~ "Registration request accepted"
+      assert response =~ "You do not need to enter your address again"
+      refute response =~ "cannot reveal whether an account exists"
+    end
   end
 
   describe "POST /users/register" do
@@ -77,7 +87,7 @@ defmodule WhoNeedHelpWeb.UserRegistrationControllerTest do
         })
 
       refute get_session(conn, :user_token)
-      assert redirected_to(conn) == ~p"/users/check-email"
+      assert redirected_to(conn) == ~p"/users/check-email?flow=register"
 
       assert conn.assigns.flash["info"] =~
                "If this address can be registered or signed in, login instructions will arrive shortly."
@@ -91,7 +101,7 @@ defmodule WhoNeedHelpWeb.UserRegistrationControllerTest do
 
       existing_conn = post(conn, ~p"/users/register", params)
 
-      assert redirected_to(existing_conn) == ~p"/users/check-email"
+      assert redirected_to(existing_conn) == ~p"/users/check-email?flow=register"
 
       assert existing_conn.assigns.flash["info"] ==
                "If this address can be registered or signed in, login instructions will arrive shortly."
diff --git a/test/who_need_help_web/controllers/user_session_controller_test.exs b/test/who_need_help_web/controllers/user_session_controller_test.exs
index 8a5e3fd..02faf9b 100644
--- a/test/who_need_help_web/controllers/user_session_controller_test.exs
+++ b/test/who_need_help_web/controllers/user_session_controller_test.exs
@@ -179,7 +179,7 @@ defmodule WhoNeedHelpWeb.UserSessionControllerTest do
         })
 
       assert Phoenix.Flash.get(conn.assigns.flash, :info) =~ "If your email is in our system"
-      assert redirected_to(conn) == ~p"/users/check-email"
+      assert redirected_to(conn) == ~p"/users/check-email?flow=login"
       assert WhoNeedHelp.Repo.get_by!(Accounts.UserToken, user_id: user.id).context == "login"
 
       assert_email_sent(fn email ->
@@ -199,7 +199,7 @@ defmodule WhoNeedHelpWeb.UserSessionControllerTest do
           "user" => %{"email" => user.email}
         })
 
-      assert redirected_to(conn) == ~p"/users/check-email"
+      assert redirected_to(conn) == ~p"/users/check-email?flow=login"
       refute WhoNeedHelp.Repo.get_by(Accounts.UserToken, user_id: user.id)
     end