diff --git a/app/controllers/admin/settings_controller.rb b/app/controllers/admin/settings_controller.rb
index 1ebf2946d8..5ec7a91674 100644
--- a/app/controllers/admin/settings_controller.rb
+++ b/app/controllers/admin/settings_controller.rb
@@ -10,6 +10,7 @@ def index
                                     .where.not(code: 'default_language')
       @billing_settings = SettingEntry.with_group('billing')
       @contacts_settings = SettingEntry.with_group('contacts')
+      @certificate_settings = SettingEntry.with_group('certificate')
     end
 
     def create
diff --git a/app/jobs/expire_certificate_reminder_job.rb b/app/jobs/expire_certificate_reminder_job.rb
index 196c53d1a8..838139a04a 100644
--- a/app/jobs/expire_certificate_reminder_job.rb
+++ b/app/jobs/expire_certificate_reminder_job.rb
@@ -1,10 +1,11 @@
 class ExpireCertificateReminderJob < ApplicationJob
   queue_as :default
-
-  DEADLINE = 1.month
   
   def perform
-    Certificate.where('expires_at < ?', DEADLINE.from_now).each do |certificate|
+    deadline_days = Setting.certificate_reminder_deadline || 30
+    deadline = deadline_days.days.from_now
+    
+    Certificate.where('expires_at < ?', deadline).where(reminder_sent: false).each do |certificate|
       send_reminder(certificate)
     end
   end
@@ -15,6 +16,7 @@ def send_reminder(certificate)
     registrar = certificate.api_user.registrar
 
     send_email(registrar, certificate)
+    certificate.update(reminder_sent: true)
   end
 
   def send_email(registrar, certificate)
diff --git a/app/views/admin/settings/index.haml b/app/views/admin/settings/index.haml
index c9a272a295..b9ba72f448 100644
--- a/app/views/admin/settings/index.haml
+++ b/app/views/admin/settings/index.haml
@@ -54,6 +54,15 @@
           - @contacts_settings.each do |setting|
             = render 'setting_row', setting: setting
 
+  .panel.panel-default
+    .panel-heading
+      = t('.certificate')
+    .table-responsive
+      %table.table.table-hover.table-bordered.table-condensed
+        %tbody
+          - @certificate_settings.each do |setting|
+            = render 'setting_row', setting: setting
+
   .row
     .col-md-12.text-right
       = submit_tag(t('.save_btn'), class: 'btn btn-success', name: nil)
diff --git a/config/locales/admin/settings.en.yml b/config/locales/admin/settings.en.yml
index bb042db013..21dbbf4fa0 100644
--- a/config/locales/admin/settings.en.yml
+++ b/config/locales/admin/settings.en.yml
@@ -9,6 +9,7 @@ en:
         billing: Billing
         contacts: Contacts
         save_btn: Save
+        certificate: Certificate
 
       create:
         saved: Settings have been successfully updated
diff --git a/db/migrate/20250910112808_add_reminder_sent_to_certificate.rb b/db/migrate/20250910112808_add_reminder_sent_to_certificate.rb
new file mode 100644
index 0000000000..a84bbde3a3
--- /dev/null
+++ b/db/migrate/20250910112808_add_reminder_sent_to_certificate.rb
@@ -0,0 +1,5 @@
+class AddReminderSentToCertificate < ActiveRecord::Migration[6.1]
+  def change
+    add_column :certificates, :reminder_sent, :boolean, default: false
+  end
+end
diff --git a/db/migrate/20250910113941_add_certificate_reminder_deadline_to_settings.rb b/db/migrate/20250910113941_add_certificate_reminder_deadline_to_settings.rb
new file mode 100644
index 0000000000..a0292e0b70
--- /dev/null
+++ b/db/migrate/20250910113941_add_certificate_reminder_deadline_to_settings.rb
@@ -0,0 +1,18 @@
+class AddCertificateReminderDeadlineToSettings < ActiveRecord::Migration[6.1]
+  def up
+    unless SettingEntry.exists?(code: 'certificate_reminder_deadline')
+      SettingEntry.create!(
+        code: 'certificate_reminder_deadline',
+        value: '30',
+        format: 'integer',
+        group: 'certificate'
+      )
+    else
+      puts "SettingEntry certificate_reminder_deadline already exists"
+    end
+  end
+
+  def down
+    SettingEntry.where(code: 'certificate_reminder_deadline').destroy_all
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index faa3014b0d..1eea7020f1 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -1,3 +1,8 @@
+\restrict 1nctSeWgAMeDygPpYdyeGcpf3SIlnwVyJaYVgeIkZgsmRdEvwgJ7hEgebG5zQ3v
+
+-- Dumped from database version 13.4 (Debian 13.4-4.pgdg110+1)
+-- Dumped by pg_dump version 13.22 (Debian 13.22-0+deb11u1)
+
 SET statement_timeout = 0;
 SET lock_timeout = 0;
 SET idle_in_transaction_session_timeout = 0;
@@ -629,7 +634,8 @@ CREATE TABLE public.certificates (
     serial character varying,
     revoked_at timestamp without time zone,
     revoked_reason integer,
-    p12_password character varying
+    p12_password character varying,
+    reminder_sent boolean DEFAULT false
 );
 
 
@@ -732,7 +738,8 @@ CREATE TABLE public.contacts (
     company_register_status character varying,
     ident_request_sent_at timestamp without time zone,
     verified_at timestamp without time zone,
-    verification_id character varying
+    verification_id character varying,
+    system_disclosed_attributes character varying[] DEFAULT '{}'::character varying[]
 );
 
 
@@ -5279,6 +5286,8 @@ ALTER TABLE ONLY public.users
 -- PostgreSQL database dump complete
 --
 
+\unrestrict 1nctSeWgAMeDygPpYdyeGcpf3SIlnwVyJaYVgeIkZgsmRdEvwgJ7hEgebG5zQ3v
+
 SET search_path TO "$user", public;
 
 INSERT INTO "schema_migrations" (version) VALUES
@@ -5767,10 +5776,13 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20230707084741'),
 ('20230710120154'),
 ('20230711083811'),
+('20240722085530'),
+('20240723110208'),
 ('20240816091049'),
 ('20240816092636'),
 ('20240924103554'),
 ('20241015071505'),
+('20241022121525'),
 ('20241030095636'),
 ('20241104104620'),
 ('20241112093540'),
@@ -5779,12 +5791,12 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20241206085817'),
 ('20250204094550'),
 ('20250219102811'),
-('20250313122119'),
-('20250319104749'),
 ('20250310133151'),
+('20250313122119'),
 ('20250314133357'),
-('20240722085530'),
-('20240723110208'),
-('20241022121525');
+('20250319104749'),
+('20250627084536'),
+('20250910112808'),
+('20250910113941');
 
 
diff --git a/test/jobs/expire_certificate_reminder_job_test.rb b/test/jobs/expire_certificate_reminder_job_test.rb
index 59df68afc0..0f1cd087d7 100644
--- a/test/jobs/expire_certificate_reminder_job_test.rb
+++ b/test/jobs/expire_certificate_reminder_job_test.rb
@@ -6,10 +6,11 @@ class ExpireCertificateReminderJobTest < ActiveJob::TestCase
   setup do
     ActionMailer::Base.deliveries.clear
     @certificate = certificates(:api)
+    
+    create_setting_if_not_exists('certificate_reminder_deadline', '30', 'integer', 'certificate')
   end
 
   def test_sends_reminder_for_expiring_certificate
-    # Устанавливаем дату истечения на 2 недели от текущего времени (меньше месяца)
     @certificate.update(expires_at: 2.weeks.from_now)
     
     perform_enqueued_jobs do
@@ -18,14 +19,12 @@ def test_sends_reminder_for_expiring_certificate
 
     assert_emails 1
     
-    # Проверяем, что письмо отправлено правильному получателю
     email = ActionMailer::Base.deliveries.last
     assert_equal @certificate.api_user.registrar.email, email.to.first
     assert_match 'Certificate Expiring', email.subject
   end
 
   def test_does_not_send_reminder_for_certificate_expiring_later
-    # Устанавливаем дату истечения на 2 месяца от текущего времени (больше месяца)
     @certificate.update(expires_at: 2.months.from_now)
     
     perform_enqueued_jobs do
@@ -36,7 +35,6 @@ def test_does_not_send_reminder_for_certificate_expiring_later
   end
 
   def test_sends_reminder_for_multiple_expiring_certificates
-    # Создаем второй сертификат, который тоже скоро истекает
     second_certificate = certificates(:registrar)
     @certificate.update(expires_at: 1.week.from_now)
     second_certificate.update(expires_at: 3.weeks.from_now)
@@ -47,4 +45,37 @@ def test_sends_reminder_for_multiple_expiring_certificates
 
     assert_emails 2
   end
+
+  def test_uses_custom_deadline_setting
+    update_setting('certificate_reminder_deadline', '10')
+    
+    @certificate.update(expires_at: 2.weeks.from_now)
+    
+    perform_enqueued_jobs do
+      ExpireCertificateReminderJob.perform_now
+    end
+
+    assert_emails 0
+    
+    @certificate.update(expires_at: 5.days.from_now)
+    
+    perform_enqueued_jobs do
+      ExpireCertificateReminderJob.perform_now
+    end
+
+    assert_emails 1
+  end
+
+  private
+
+  def create_setting_if_not_exists(code, value, format, group)
+    unless SettingEntry.exists?(code: code)
+      SettingEntry.create!(code: code, value: value, format: format, group: group)
+    end
+  end
+
+  def update_setting(code, value)
+    setting = SettingEntry.find_by(code: code)
+    setting.update!(value: value) if setting
+  end
 end