diff --git a/lib/postmark/account_api_client.rb b/lib/postmark/account_api_client.rb
index 8ab79d8..65e3492 100644
--- a/lib/postmark/account_api_client.rb
+++ b/lib/postmark/account_api_client.rb
@@ -98,6 +98,10 @@ def verify_domain_return_path(id)
       format_response http_client.put("domains/#{id.to_i}/verifyreturnpath")
     end
 
+    def verify_domain_custom_tracking(id)
+      format_response http_client.put("domains/#{id.to_i}/verifycustomtracking")
+    end
+
     def verified_domain_spf?(id)
       !!http_client.post("domains/#{id.to_i}/verifyspf")['SPFVerified']
     end
diff --git a/spec/unit/postmark/account_api_client_spec.rb b/spec/unit/postmark/account_api_client_spec.rb
index 408a221..c1d9dd3 100644
--- a/spec/unit/postmark/account_api_client_spec.rb
+++ b/spec/unit/postmark/account_api_client_spec.rb
@@ -448,6 +448,16 @@
       end
     end
 
+    describe '#verify_domain_custom_tracking' do
+      let(:response) { {"CustomTrackingVerified" => true } }
+
+      it 'performs a PUT request to /domains/:id/verifycustomtracking endpoint' do
+        expect(subject.http_client).to receive(:put).
+          with('domains/42/verifycustomtracking').and_return(response)
+        subject.verify_domain_custom_tracking(42)
+      end
+    end
+
     describe '#verified_domain_spf?' do
       let(:response) { {"SPFVerified" => true} }
       let(:false_response) { {"SPFVerified" => false} }