diff --git a/lib/graphql/resolvers/user.ex b/lib/graphql/resolvers/user.ex
index 55330e67b..15ce54e63 100644
--- a/lib/graphql/resolvers/user.ex
+++ b/lib/graphql/resolvers/user.ex
@@ -153,13 +153,13 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
     - send a validation email to the user
   """
   @spec create_user(any, %{email: String.t()}, any) :: {:ok, User.t()} | {:error, String.t()}
-  def create_user(_parent, %{email: email} = args, %{context: context}) do
+  def create_user(_parent, %{email: email, moderation: moderation} = args, %{context: context}) do
     current_ip = Map.get(context, :ip)
     user_agent = Map.get(context, :user_agent, "")
     now = DateTime.utc_now()
 
     with {:ok, email} <- lowercase_domain(email),
-         :registration_ok <- check_registration_config(email),
+         :registration_ok <- check_registration_config(email, moderation),
          :not_deny_listed <- check_registration_denylist(email),
          {:spam, :ham} <-
            {:spam, AntiSpam.service().check_user(email, current_ip, user_agent)},
@@ -176,6 +176,9 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
       :registration_closed ->
         {:error, dgettext("errors", "Registrations are not open")}
 
+      :moderation_empty ->
+        {:error, dgettext("errors", "Moderation text must not be empty")}
+
       :not_allowlisted ->
         {:error, dgettext("errors", "Your email is not on the allowlist")}
 
@@ -198,12 +201,12 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
     end
   end
 
-  @spec check_registration_config(String.t()) ::
-          :registration_ok | :registration_closed | :not_allowlisted
-  defp check_registration_config(email) do
+  @spec check_registration_config(String.t(), String.t()) ::
+          :registration_ok | :registration_closed | :not_allowlisted | :moderation_empty
+  defp check_registration_config(email, moderation) do
     cond do
       Config.instance_registrations_open?() ->
-        :registration_ok
+        check_moderation(moderation)
 
       Config.instance_registrations_allowlist?() ->
         check_allow_listed_email(email)
@@ -223,6 +226,19 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
       else: :not_deny_listed
   end
 
+  @spec check_moderation(String.t()) :: :registration_ok | :moderation_empty
+  defp check_moderation(moderation) do
+    if Config.instance_registrations_moderation?() do
+      if moderation |> String.trim() == "" do
+        :moderation_empty
+      else
+        :registration_ok
+      end
+    else
+      :registration_ok
+    end
+  end
+
   @spec check_allow_listed_email(String.t()) :: :registration_ok | :not_allowlisted
   defp check_allow_listed_email(email) do
     if email_in_list?(email, Config.instance_registrations_allowlist()),
diff --git a/lib/graphql/schema/user.ex b/lib/graphql/schema/user.ex
index 91936b659..a959f1212 100644
--- a/lib/graphql/schema/user.ex
+++ b/lib/graphql/schema/user.ex
@@ -25,6 +25,7 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
     interfaces([:action_log_object])
     field(:id, :id, description: "The user's ID")
     field(:email, non_null(:string), description: "The user's email")
+    field(:moderation, :string, description: "The user's moderation text")
 
     field(:actors, non_null(list_of(:person)),
       description: "The user's list of profiles (identities)"
@@ -345,6 +346,7 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
     field :create_user, type: :user do
       arg(:email, non_null(:string), description: "The new user's email")
       arg(:password, non_null(:string), description: "The new user's password")
+      arg(:moderation, :string, description: "The new user's moderation text")
       arg(:locale, :string, description: "The new user's locale")
       middleware(Rajska.QueryAuthorization, permit: :all)
       middleware(Rajska.RateLimiter, limit: user_ip_limiter(@env))
diff --git a/lib/mobilizon/users/user.ex b/lib/mobilizon/users/user.ex
index a0ab59673..62319cfe4 100644
--- a/lib/mobilizon/users/user.ex
+++ b/lib/mobilizon/users/user.ex
@@ -16,6 +16,7 @@ defmodule Mobilizon.Users.User do
 
   @type t :: %__MODULE__{
           email: String.t(),
+          moderation: String.t(),
           password_hash: String.t(),
           password: String.t(),
           role: atom(),
@@ -40,6 +41,7 @@ defmodule Mobilizon.Users.User do
 
   @required_attrs [:email]
   @optional_attrs [
+    :moderation,
     :role,
     :password,
     :password_hash,
@@ -61,7 +63,6 @@ defmodule Mobilizon.Users.User do
   @attrs @required_attrs ++ @optional_attrs
 
   @registration_required_attrs @required_attrs ++ [:password]
-
   @auth_provider_required_attrs @required_attrs ++ [:provider]
 
   @password_change_required_attrs [:password]
@@ -72,6 +73,7 @@ defmodule Mobilizon.Users.User do
 
   schema "users" do
     field(:email, :string)
+    field(:moderation, :string)
     field(:password_hash, :string)
     field(:password, :string, virtual: true)
     field(:role, UserRole, default: :user)
diff --git a/priv/repo/migrations/20250911120910_add_moderation_to_users.exs b/priv/repo/migrations/20250911120910_add_moderation_to_users.exs
new file mode 100644
index 000000000..b1785b718
--- /dev/null
+++ b/priv/repo/migrations/20250911120910_add_moderation_to_users.exs
@@ -0,0 +1,9 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddModerationToUser do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      add(:moderation, :string, default: "")
+    end
+  end
+end
diff --git a/schema.graphql b/schema.graphql
index c59b1bd1d..0c6395622 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -1263,6 +1263,9 @@ type RootMutationType {
     "The new user's password"
     password: String!
 
+    "The new user's moderation text"
+    moderation: String!
+
     "The new user's locale"
     locale: String
   ): User
diff --git a/test/graphql/resolvers/user_test.exs b/test/graphql/resolvers/user_test.exs
index 3c2c425bd..7e32d0a40 100644
--- a/test/graphql/resolvers/user_test.exs
+++ b/test/graphql/resolvers/user_test.exs
@@ -60,10 +60,11 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
   """
 
   @create_user_mutation """
-  mutation CreateUser($email: String!, $password: String!, $locale: String) {
+  mutation CreateUser($email: String!, $password: String!, $moderation: String!, $locale: String) {
     createUser(
       email: $email
       password: $password
+      moderation: $moderation
       locale: $locale
   ) {
       id,
@@ -133,7 +134,12 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     }
   """
 
-  @valid_actor_params %{email: "test@test.tld", password: "testest", username: "test"}
+  @valid_actor_params %{
+    email: "test@test.tld",
+    password: "testest",
+    moderation: "",
+    username: "test"
+  }
   @valid_single_actor_params %{preferred_username: "test2", keys: "yolo"}
 
   describe "Resolver: Get an user" do
@@ -355,17 +361,31 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
       email: "test@demo.tld",
       password: "long password",
       locale: "fr_FR",
+      moderation: "  ",
+      preferredUsername: "toto",
+      name: "Sir Toto",
+      summary: "Sir Toto, prince of the functional tests"
+    }
+    @user_creation_with_moderation %{
+      email: "test@demo.tld",
+      password: "long password",
+      locale: "fr_FR",
+      moderation: "moderation text",
       preferredUsername: "toto",
       name: "Sir Toto",
       summary: "Sir Toto, prince of the functional tests"
     }
     @user_creation_bad_email %{
       email: "y@l@",
-      password: "long password"
+      password: "long password",
+      moderation: ""
     }
 
     test "test create_user/3 creates an user",
          %{conn: conn} do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
+
       res =
         conn
         |> AbsintheHelpers.graphql_query(
@@ -382,6 +402,9 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "create_user/3 doesn't allow two users with the same email", %{conn: conn} do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
+
       res =
         conn
         |> put_req_header("accept-language", "fr")
@@ -421,6 +444,44 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
       Config.put([:instance, :registrations_moderation], false)
     end
 
+    test "create_user/3 allows registration with moderation text empty", %{conn: conn} do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], true)
+
+      res =
+        conn
+        |> AbsintheHelpers.graphql_query(
+          query: @create_user_mutation,
+          variables: @user_creation
+        )
+
+      assert hd(res["errors"])["message"] == "Moderation text must not be empty"
+
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
+    end
+
+    test "create_user/3 allows registration with moderation text", %{conn: conn} do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], true)
+
+      res =
+        conn
+        |> AbsintheHelpers.graphql_query(
+          query: @create_user_mutation,
+          variables: @user_creation_with_moderation
+        )
+
+      assert res["data"]["createUser"]["email"] == @user_creation.email
+      assert res["data"]["createUser"]["locale"] == @user_creation.locale
+
+      {:ok, user} = Users.get_user_by_email(@user_creation.email)
+      assert user.moderation == @user_creation_with_moderation.moderation
+
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
+    end
+
     test "create_user/3 doesn't allow registration when user email is not on the allowlist", %{
       conn: conn
     } do
@@ -484,6 +545,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     test "create_user/3 doesn't allow registration when user email domain is on the denylist", %{
       conn: conn
     } do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
       Config.put([:instance, :registration_email_denylist], ["demo.tld"])
 
       res =
@@ -504,6 +567,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     test "create_user/3 doesn't allow registration when user email is on the denylist", %{
       conn: conn
     } do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
       Config.put([:instance, :registration_email_denylist], [@user_creation.email])
 
       res =
@@ -525,6 +590,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
          %{
            conn: conn
          } do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
       Config.put([:instance, :registration_email_denylist], [@user_creation.email])
 
       res =
@@ -546,6 +613,9 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
          %{
            conn: conn
          } do
+      Config.put([:instance, :registrations_open], true)
+      Config.put([:instance, :registrations_moderation], false)
+
       res =
         conn
         |> AbsintheHelpers.graphql_query(
@@ -621,7 +691,12 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
   describe "Resolver: Resend confirmation emails" do
     test "test resend_confirmation_email/3 with valid email resends an validation email",
          %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+      {:ok, %User{} = user} =
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
 
       res =
         AbsintheHelpers.graphql_query(conn,
@@ -714,7 +789,11 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
 
     test "test send_reset_password/3 for a deactivated user doesn't send email", %{conn: conn} do
       {:ok, %User{email: email} = user} =
-        Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
 
       Users.update_user(user, %{confirmed_at: DateTime.utc_now(), disabled: true})
 
@@ -732,7 +811,13 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
 
   describe "Resolver: Reset user's password" do
     test "test reset_password/3 with valid email", context do
-      {:ok, %User{} = user} = Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+      {:ok, %User{} = user} =
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
+
       Users.update_user(user, %{confirmed_at: DateTime.utc_now()})
       %Actor{} = insert(:actor, user: user)
       {:ok, _email_sent} = Email.User.send_password_reset_email(user)
@@ -814,7 +899,12 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
 
   describe "Resolver: Login a user" do
     test "test login_user/3 with valid credentials", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+      {:ok, %User{} = user} =
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
 
       {:ok, %User{} = _user} =
         Users.update_user(user, %{
@@ -835,7 +925,12 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "test login_user/3 with invalid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+      {:ok, %User{} = user} =
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
 
       {:ok, %User{} = _user} =
         Users.update_user(user, %{
@@ -868,7 +963,12 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "test login_user/3 with unconfirmed user", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: "toto@tata.tld", password: "p4ssw0rd"})
+      {:ok, %User{} = user} =
+        Users.register(%{
+          email: "toto@tata.tld",
+          password: "p4ssw0rd",
+          moderation: @moderation_empty
+        })
 
       res =
         conn
@@ -990,11 +1090,14 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
 
   describe "Resolver: Change password for an user" do
     @email "toto@tata.tld"
+    @moderation_fill "moderation text"
+    @moderation_empty ""
     @old_password "p4ssw0rd"
     @new_password "upd4t3d"
 
     test "change_password/3 with valid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @old_password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @old_password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1066,7 +1169,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_password/3 with invalid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @old_password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @old_password, moderation: @moderation_empty})
 
       # Hammer time !
 
@@ -1094,7 +1198,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_password/3 with same password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @old_password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @old_password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1122,7 +1227,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_password/3 with new password too short", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @old_password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @old_password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1150,7 +1256,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_password/3 without being authenticated", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @old_password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @old_password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1183,7 +1290,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     @password "p4ssw0rd"
 
     test "change_email/3 with valid email", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1233,7 +1341,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_email/3 with valid email but invalid token", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1286,7 +1395,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_email/3 with invalid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1308,7 +1418,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_email/3 with same email", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1330,7 +1441,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_email/3 with invalid email", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1352,7 +1464,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "change_password/3 without being authenticated", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @old_email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @old_email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
@@ -1379,7 +1492,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     @password "p4ssw0rd"
 
     test "delete_account/3 with valid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = user} =
@@ -1453,7 +1567,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "delete_account/3 with invalid password", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = user} =
@@ -1475,7 +1590,8 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
     end
 
     test "delete_account/3 without being authenticated", %{conn: conn} do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation_empty})
 
       # Hammer time !
       {:ok, %User{} = _user} =
diff --git a/test/mobilizon/users/users_test.exs b/test/mobilizon/users/users_test.exs
index 28f6a87f8..0c916bc5e 100644
--- a/test/mobilizon/users/users_test.exs
+++ b/test/mobilizon/users/users_test.exs
@@ -7,9 +7,9 @@ defmodule Mobilizon.UsersTest do
   import Mobilizon.Factory
 
   describe "users" do
-    @valid_attrs %{email: "foo@bar.tld", password: "some password"}
+    @valid_attrs %{email: "foo@bar.tld", password: "some password", moderation: "moderation text"}
     @update_attrs %{email: "foo@fighters.tld", password: "some updated password"}
-    @invalid_attrs %{email: nil, password: nil}
+    @invalid_attrs %{email: nil, password: nil, moderation: nil}
 
     test "list_users/0 returns all users" do
       user = insert(:user)
@@ -69,9 +69,11 @@ defmodule Mobilizon.UsersTest do
 
     @email "email@domain.tld"
     @password "password"
+    @moderation "moderation text"
 
     test "get_user_by_email/1 finds an user by its email" do
-      {:ok, %User{email: email} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{email: email} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation})
 
       assert email == @email
       {:ok, %User{id: id}} = Users.get_user_by_email(@email)
@@ -80,7 +82,8 @@ defmodule Mobilizon.UsersTest do
     end
 
     test "get_user_by_email/1 finds an activated user by its email" do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation})
 
       {:ok, %User{id: id}} = Users.get_user_by_email(@email, activated: false)
       assert id == user.id
@@ -99,7 +102,8 @@ defmodule Mobilizon.UsersTest do
 
     @unconfirmed_email "unconfirmed@email.com"
     test "get_user_by_email/1 finds an user by its pending email" do
-      {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
+      {:ok, %User{} = user} =
+        Users.register(%{email: @email, password: @password, moderation: @moderation})
 
       Users.update_user(user, %{
         "confirmed_at" => DateTime.utc_now() |> DateTime.truncate(:second),
diff --git a/test/support/factory.ex b/test/support/factory.ex
index c4a784411..617451f12 100644
--- a/test/support/factory.ex
+++ b/test/support/factory.ex
@@ -16,6 +16,7 @@ defmodule Mobilizon.Factory do
     %Mobilizon.Users.User{
       password_hash: "Jane Smith",
       email: sequence(:email, &"email-#{&1}@example.com"),
+      moderation: "",
       role: :user,
       confirmed_at: DateTime.utc_now() |> DateTime.truncate(:second),
       confirmation_sent_at: nil,