diff --git a/app/models/proposal_notification.rb b/app/models/proposal_notification.rb
index d31b2e1a5..11bfea8ae 100644
--- a/app/models/proposal_notification.rb
+++ b/app/models/proposal_notification.rb
@@ -5,4 +5,13 @@ class ProposalNotification < ActiveRecord::Base
   validates :title, presence: true
   validates :body, presence: true
   validates :proposal, presence: true
+  validate :minimum_interval
+
+  def minimum_interval
+    return true if proposal.notifications.blank?
+    if proposal.notifications.last.created_at > (Time.now - Setting[:proposal_notification_minimum_interval_in_days].to_i.days).to_datetime
+      errors.add(:minimum_interval, I18n.t('activerecord.errors.models.proposal_notification.minimum_interval', interval: Setting[:proposal_notification_minimum_interval]))
+    end
+  end
+
 end
\ No newline at end of file
diff --git a/config/locales/activerecord.en.yml b/config/locales/activerecord.en.yml
index 91c035dfb..1d46596c2 100644
--- a/config/locales/activerecord.en.yml
+++ b/config/locales/activerecord.en.yml
@@ -84,3 +84,6 @@ en:
           attributes:
             tag_list:
               less_than_or_equal_to: "tags must be less than or equal to %{count}"
+        proposal_notification:
+          attributes:
+            minimum_interval: "You have to wait a minium of %{interval} days between notifications"
\ No newline at end of file
diff --git a/config/locales/activerecord.es.yml b/config/locales/activerecord.es.yml
index a7644f02e..001be7228 100644
--- a/config/locales/activerecord.es.yml
+++ b/config/locales/activerecord.es.yml
@@ -84,3 +84,6 @@ es:
           attributes:
             tag_list:
               less_than_or_equal_to: "los temas deben ser menor o igual que %{count}"
+        proposal_notification:
+          attributes:
+            minimum_interval: "Debes esperar un mínimo de %{interval} días entre notificaciones"
\ No newline at end of file
diff --git a/db/seeds.rb b/db/seeds.rb
index 7555f6999..5a6db1574 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -74,3 +74,6 @@ Setting['banner-style.banner-style-three'] = "Banner style 3"
 Setting['banner-img.banner-img-one']   = "Banner image 1"
 Setting['banner-img.banner-img-two']   = "Banner image 2"
 Setting['banner-img.banner-img-three'] = "Banner image 3"
+
+# Proposal notifications
+Setting['proposal_notification_minimum_interval_in_days '] = 3
diff --git a/spec/features/proposal_notifications_spec.rb b/spec/features/proposal_notifications_spec.rb
index f40e0b81e..87a717ba2 100644
--- a/spec/features/proposal_notifications_spec.rb
+++ b/spec/features/proposal_notifications_spec.rb
@@ -84,4 +84,14 @@ feature 'Proposal Notifications' do
     expect(page).to have_content error_message
   end
 
+  context "Limits" do
+
+    pending "Cannot send more than one notification within established interval" do
+    end
+
+    pending "use timecop to make sure notifications can be sent after time interval" do
+    end
+
+  end
+
 end
\ No newline at end of file
diff --git a/spec/models/proposal_notification_spec.rb b/spec/models/proposal_notification_spec.rb
index 5a7575219..f66b254b6 100644
--- a/spec/models/proposal_notification_spec.rb
+++ b/spec/models/proposal_notification_spec.rb
@@ -22,4 +22,38 @@ describe ProposalNotification do
     expect(notification).to_not be_valid
   end
 
+  describe "minimum interval between notifications" do
+
+    before(:each) do
+      Setting[:proposal_notification_minimum_interval_in_days] = 3
+    end
+
+    it "should not be valid if below minium interval" do
+      proposal = create(:proposal)
+
+      notification1 = create(:proposal_notification, proposal: proposal)
+      notification2 = build(:proposal_notification, proposal: proposal)
+
+      proposal.reload
+      expect(notification2).to_not be_valid
+    end
+
+    it "should be valid if notifications above minium interval" do
+      proposal = create(:proposal)
+
+      notification1 = create(:proposal_notification, proposal: proposal, created_at: 4.days.ago)
+      notification2 = build(:proposal_notification, proposal: proposal)
+
+      proposal.reload
+      expect(notification2).to be_valid
+    end
+
+    it "should be valid if no notifications sent" do
+      notification1 = build(:proposal_notification)
+
+      expect(notification1).to be_valid
+    end
+
+  end
+
 end