diff --git a/lib/mail/notify.rb b/lib/mail/notify.rb
index 480116d..53125d9 100644
--- a/lib/mail/notify.rb
+++ b/lib/mail/notify.rb
@@ -5,7 +5,6 @@
 require "mail/notify/version"
 require "mail/notify/railtie" if defined? Rails
 require "mail/notify/delivery_method"
-require "mail/notify/personalisation"
 require "mail/notify/mailer"
 require "mail/notify/message"
 require "mail/notify/mail_notify_previews_controller"
diff --git a/lib/mail/notify/mailer.rb b/lib/mail/notify/mailer.rb
index f3c12c8..64f0c57 100644
--- a/lib/mail/notify/mailer.rb
+++ b/lib/mail/notify/mailer.rb
@@ -91,7 +91,7 @@ def view_mail(template_id, options)
       # allows blank personalisation options
 
       def blank_allowed(value)
-        value.presence || Personalisation::BLANK
+        value.to_s
       end
     end
   end
diff --git a/lib/mail/notify/personalisation.rb b/lib/mail/notify/personalisation.rb
deleted file mode 100644
index 4aeb2e7..0000000
--- a/lib/mail/notify/personalisation.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-# frozen_string_literal: true
-
-module Mail
-  module Notify
-    class Personalisation
-      BLANK = Object.new
-
-      def initialize(mail)
-        @body = mail.body.raw_source
-        @subject = mail.subject
-        @personalisation = mail[:personalisation]&.unparsed_value || {}
-      end
-
-      def to_h
-        merged_options
-          .reject { |_k, v| v.blank? }
-          .transform_values { |value| (value == BLANK) ? "" : value }
-      end
-
-      private
-
-      def merged_options
-        {
-          body: @body,
-          subject: @subject
-        }.merge(@personalisation)
-      end
-    end
-  end
-end
diff --git a/spec/mail/notify/mailer_spec.rb b/spec/mail/notify/mailer_spec.rb
index 3e3bd98..63ab48a 100644
--- a/spec/mail/notify/mailer_spec.rb
+++ b/spec/mail/notify/mailer_spec.rb
@@ -211,9 +211,15 @@
       end
     end
 
-    context "when given a blank value" do
+    context "when given an empty string" do
       it "returns explicitly blank personalisation" do
-        expect(TestMailer.new.blank_allowed("")).to be Mail::Notify::Personalisation::BLANK
+        expect(TestMailer.new.blank_allowed("")).to eq ""
+      end
+    end
+
+    context "when given nil" do
+      it "returns an empty string" do
+        expect(TestMailer.new.blank_allowed(nil)).to eq ""
       end
     end
   end
diff --git a/spec/mail/notify/personalisation_spec.rb b/spec/mail/notify/personalisation_spec.rb
deleted file mode 100644
index 36fa524..0000000
--- a/spec/mail/notify/personalisation_spec.rb
+++ /dev/null
@@ -1,64 +0,0 @@
-# frozen_string_literal: true
-
-require "spec_helper"
-
-RSpec.describe Mail::Notify::Personalisation do
-  let(:personalisation) { described_class.new(mail) }
-
-  context "without any personalisation" do
-    let(:mail) { Mail.new(body: "foo", subject: "bar") }
-
-    it "returns the body and subject as a hash" do
-      expect(personalisation.to_h).to eq(
-        body: "foo",
-        subject: "bar"
-      )
-    end
-  end
-
-  context "with some personalisations" do
-    let(:mail) do
-      Mail.new(body: "foo", subject: "bar", personalisation: {
-        foo: "bar"
-      })
-    end
-
-    it "merges everything" do
-      expect(personalisation.to_h).to eq(
-        :body => "foo",
-        :subject => "bar",
-        "foo" => "bar"
-      )
-    end
-  end
-
-  context "with blank subject and body" do
-    let(:mail) do
-      Mail.new(body: "", subject: "", personalisation: {
-        foo: "bar"
-      })
-    end
-
-    it "removes the subject and body" do
-      expect(personalisation.to_h).to eq(
-        "foo" => "bar"
-      )
-    end
-  end
-
-  context "with explicitly blank personalisation" do
-    let(:mail) { Mail.new(personalisation: {foo: Mail::Notify::Personalisation::BLANK}) }
-
-    it "replaces it with a blank string" do
-      expect(personalisation.to_h).to eq("foo" => "")
-    end
-  end
-
-  context "with implicitly blank personalisation" do
-    let(:mail) { Mail.new(personalisation: {foo: [nil, "", false].sample}) }
-
-    it "removes it from the hash" do
-      expect(personalisation.to_h).to be_empty
-    end
-  end
-end