diff --git a/app/mailers/request_mailer.rb b/app/mailers/request_mailer.rb
index 814916a1e8..570b77c08d 100644
--- a/app/mailers/request_mailer.rb
+++ b/app/mailers/request_mailer.rb
@@ -16,8 +16,10 @@ def request_cancel_partner_notification(request_id:)
     end
     @formatted_requested_items.sort_by! { |rt| rt[:name] }
 
+    recipients = [@partner.email, @request.requester.email].uniq
+
     mail(
-      to: @partner.email,
+      to: recipients,
       subject: "Your essentials request (##{@request.id}) has been canceled."
     )
   end
diff --git a/spec/mailers/request_mailer_spec.rb b/spec/mailers/request_mailer_spec.rb
index 4ea835077e..ffc7813d00 100644
--- a/spec/mailers/request_mailer_spec.rb
+++ b/spec/mailers/request_mailer_spec.rb
@@ -1,22 +1,35 @@
 RSpec.describe RequestMailer, type: :mailer do
   describe "#request_cancel_partner_notification" do
     subject { described_class.request_cancel_partner_notification(request_id: request.id) }
-    let(:request) { create(:request) }
 
-    it "renders the body with correct text with partner information" do
-      html = html_body(subject)
-      expect(html).to include("Hello there, <strong>#{request.partner.name}</strong>")
-      expect(html).to include("One of your essentials requests (##{request.id}) have been canceled.")
-      text = text_body(subject)
-      expect(text).to include("Hello there, #{request.partner.name}")
-      expect(text).to include("One of your essentials requests (##{request.id}) have been canceled.")
+    let(:partner) { create(:partner, email: "partner@example.com") }
+
+    context "when the request was sent by a partner user" do
+      let(:partner_user) { create(:partner_user, email: "requester@example.com", partner: partner) }
+      let(:request) { create(:request, partner: partner, partner_user: partner_user) }
+
+      it "renders the body with correct text with partner information" do
+        html = html_body(subject)
+        expect(html).to include("Hello there, <strong>#{request.partner.name}</strong>")
+        expect(html).to include("One of your essentials requests (##{request.id}) have been canceled.")
+        text = text_body(subject)
+        expect(text).to include("Hello there, #{request.partner.name}")
+        expect(text).to include("One of your essentials requests (##{request.id}) have been canceled.")
+      end
+
+      it "is sent to both the partner and the request sender with the correct subject line" do
+        expect(subject.to).to match_array(["partner@example.com", "requester@example.com"])
+        expect(subject.from).to eq(['no-reply@humanessentials.app'])
+        expect(subject.subject).to eq("Your essentials request (##{request.id}) has been canceled.")
+      end
     end
 
-    it "should be sent to the partner main email with the correct subject line" do
-      expect(subject.to).to eq([request.partner.email])
-      expect(subject.from).to eq(['no-reply@humanessentials.app'])
-      expect(subject.subject).to eq("Your essentials request (##{request.id}) has been canceled.")
+    context "when the request has no partner user" do
+      let(:request) { create(:request, partner: partner, partner_user: nil) }
+
+      it "is sent only to the partner main email" do
+        expect(subject.to).to eq(["partner@example.com"])
+      end
     end
   end
 end
-