diff --git a/app/assets/stylesheets/components/SiteSettings/Invitations/index.scss b/app/assets/stylesheets/components/SiteSettings/Invitations/index.scss
index 9b42c2a3..bce9f29b 100644
--- a/app/assets/stylesheets/components/SiteSettings/Invitations/index.scss
+++ b/app/assets/stylesheets/components/SiteSettings/Invitations/index.scss
@@ -84,9 +84,13 @@
       div.invitationInfo {
         @extend .d-flex;
   
-        span.invitationAcceptedAt, span.invitationSentAt {
+        span.invitationAcceptedAt, span.invitationSentAt, span.invitationExpired {
           @extend .align-self-center, .mutedText;
         }
+
+        span.invitationExpired {
+          @extend .text-danger;
+        }
       }
     }
   }
diff --git a/app/controllers/invitations_controller.rb b/app/controllers/invitations_controller.rb
index 8db5cfa5..da218f17 100644
--- a/app/controllers/invitations_controller.rb
+++ b/app/controllers/invitations_controller.rb
@@ -56,7 +56,6 @@ class InvitationsController < ApplicationController
     render json: {}, status: :ok
   end
 
-
   private
 
     def invitation_params
@@ -66,4 +65,4 @@ class InvitationsController < ApplicationController
         invitation.require(:body)
       end
     end
-end
\ No newline at end of file
+end
diff --git a/app/controllers/registrations_controller.rb b/app/controllers/registrations_controller.rb
index 5888feb7..17963bf3 100644
--- a/app/controllers/registrations_controller.rb
+++ b/app/controllers/registrations_controller.rb
@@ -14,12 +14,11 @@ class RegistrationsController < Devise::RegistrationsController
 
     # Handle invitations
     is_invitation = sign_up_params[:invitation_token].present?
-    is_invitation_valid = true
     invitation = nil
     if is_invitation
       invitation = Invitation.find_by(email: email)
       
-      if invitation.nil? || invitation.token_digest != Digest::SHA256.hexdigest(sign_up_params[:invitation_token]) || invitation.accepted_at.present?
+      if invitation.nil? || invitation.expired? || invitation.token_digest != Digest::SHA256.hexdigest(sign_up_params[:invitation_token]) || invitation.accepted_at.present?
         flash[:alert] = t('errors.unauthorized')
         redirect_to new_user_registration_path and return
       end
diff --git a/app/javascript/components/SiteSettings/Invitations/index.tsx b/app/javascript/components/SiteSettings/Invitations/index.tsx
index efb67793..c19d4666 100644
--- a/app/javascript/components/SiteSettings/Invitations/index.tsx
+++ b/app/javascript/components/SiteSettings/Invitations/index.tsx
@@ -10,7 +10,7 @@ import buildRequestHeaders from '../../../helpers/buildRequestHeaders';
 import HttpStatus from '../../../constants/http_status';
 import { isValidEmail } from '../../../helpers/regex';
 import IInvitation from '../../../interfaces/IInvitation';
-import friendlyDate from '../../../helpers/datetime';
+import friendlyDate, { fromRailsStringToJavascriptDate, nMonthsAgo } from '../../../helpers/datetime';
 import ActionLink from '../../common/ActionLink';
 import { TestIcon } from '../../common/Icons';
 
@@ -229,9 +229,14 @@ const Invitations = ({ siteName, invitations, currentUserEmail, authenticityToke
                       { I18n.t('site_settings.invitations.accepted_at', { when: friendlyDate(invitation.accepted_at) }) }
                     </span>
                   :
-                    <span className="invitationSentAt" title={invitation.updated_at}>
-                      { I18n.t('site_settings.invitations.sent_at', { when: friendlyDate(invitation.updated_at) }) }
-                    </span>
+                    fromRailsStringToJavascriptDate(invitation.updated_at) > nMonthsAgo(3) ?
+                      <span className="invitationSentAt" title={invitation.updated_at}>
+                        { I18n.t('site_settings.invitations.sent_at', { when: friendlyDate(invitation.updated_at) }) }
+                      </span>
+                    :
+                      <span className="invitationExpired">
+                        { I18n.t('site_settings.invitations.expired') }
+                      </span>
                 }
               </div>
             </li>
@@ -243,4 +248,4 @@ const Invitations = ({ siteName, invitations, currentUserEmail, authenticityToke
   );
 };
 
-export default Invitations;
\ No newline at end of file
+export default Invitations;
diff --git a/app/javascript/helpers/datetime.ts b/app/javascript/helpers/datetime.ts
index 02f00799..820bc81c 100644
--- a/app/javascript/helpers/datetime.ts
+++ b/app/javascript/helpers/datetime.ts
@@ -47,4 +47,19 @@ export const fromRailsStringToJavascriptDate = date => {
 
 export const fromJavascriptDateToRailsString = (date: Date) => {
   return date.toJSON();
+}
+
+export const nMonthsAgo = (n: number) => {
+  const currentDate = new Date();
+
+  return new Date(
+    Date.UTC(
+      currentDate.getFullYear(),
+      currentDate.getMonth() - n,
+      currentDate.getDate(),
+      currentDate.getHours(),
+      currentDate.getMinutes(),
+      currentDate.getSeconds()
+    )
+  );
 }
\ No newline at end of file
diff --git a/app/models/invitation.rb b/app/models/invitation.rb
index 67b3ac5e..ad13f69f 100644
--- a/app/models/invitation.rb
+++ b/app/models/invitation.rb
@@ -1,3 +1,9 @@
 class Invitation < ApplicationRecord
   include TenantOwnable
+
+  belongs_to :tenant
+
+  def expired?
+    updated_at <= 3.months.ago
+  end
 end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index bc131b3b..03a9d87a 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -272,6 +272,7 @@ en:
       accepted: 'Accepted'
       sent_at: 'Sent %{when}'
       accepted_at: 'Accepted %{when}'
+      expired: 'Expired'
     appearance:
       title: 'Appearance'
       learn_more: 'Learn how to customize appearance'