diff --git a/app/mailers/policy_manager/portability_mailer.rb b/app/mailers/policy_manager/portability_mailer.rb
index 4f92c31..812e105 100644
--- a/app/mailers/policy_manager/portability_mailer.rb
+++ b/app/mailers/policy_manager/portability_mailer.rb
@@ -3,7 +3,7 @@ class PortabilityMailer < ApplicationMailer
 
     def progress_notification(portability_request_id)
       @portability_request = PortabilityRequest.find(portability_request_id)
-      @user = User.find(@portability_request.user_id)
+      @user = Config.user_resource.find(@portability_request.user_id)
       
       opts = { :to => @user.email, :subject => I18n.t("terms_app.mails.progress.subject") }
       opts.merge!({
@@ -18,7 +18,7 @@ def progress_notification(portability_request_id)
 
     def completed_notification(portability_request_id)
       @portability_request = PortabilityRequest.find(portability_request_id)
-      @user = User.find(@portability_request.user_id)
+      @user = Config.user_resource.find(@portability_request.user_id)
       @link = @portability_request.download_link
       
       opts = { :to => @user.email, :subject => I18n.t("terms_app.mails.completed.subject") }
@@ -33,7 +33,7 @@ def completed_notification(portability_request_id)
     end
 
     def admin_notification(user_id)
-      @user = User.find(user_id)
+      @user = Config.user_resource.find(user_id)
   
       opts = { :to => Config.admin_email(@user), :subject => I18n.t("terms_app.mails.admin.subject", email: @user.email) }
       opts.merge!({
diff --git a/app/models/policy_manager/portability_request.rb b/app/models/policy_manager/portability_request.rb
index ea1a4ef..102b979 100644
--- a/app/models/policy_manager/portability_request.rb
+++ b/app/models/policy_manager/portability_request.rb
@@ -5,7 +5,7 @@ module PolicyManager
   class PortabilityRequest < ApplicationRecord
     include Paperclip::Glue
 
-    belongs_to :user
+    belongs_to :user, class_name: Config.user_resource.to_s
 
     has_attached_file :attachment, 
       path: Config.exporter.try(:attachment_path) || Rails.root.join("tmp/portability/:id/build.zip").to_s, 
diff --git a/app/models/policy_manager/user_term.rb b/app/models/policy_manager/user_term.rb
index 3136f12..bfaa177 100644
--- a/app/models/policy_manager/user_term.rb
+++ b/app/models/policy_manager/user_term.rb
@@ -4,7 +4,7 @@ module PolicyManager
   class UserTerm < ApplicationRecord
     include AASM
     
-    belongs_to :user
+    belongs_to :user, class_name: Config.user_resource.to_s
     belongs_to :term
 
     validates_uniqueness_of :term_id, :scope => :user_id