diff --git a/lib/parent_code_repo.rb b/lib/parent_code_repo.rb
index cb5c0702b7c22c3cfb333abbb45ef58019630fc2..a8f614c5e1ae8102eb4cd7f1741ed07af7d2925f 100644
--- a/lib/parent_code_repo.rb
+++ b/lib/parent_code_repo.rb
@@ -9,7 +9,12 @@ class ParentCodeRepo
 	end
 
 	def find(code)
-		@redis.hget("jmp_parent_codes", code)
+		@redis.hget("jmp_parent_codes", code).then do |parent_id|
+			(parent_id ? @redis.get("jmp_customer_trust_level-#{parent_id}") : nil)
+				.then do |tl|
+					tl == "Tomb" ? nil : parent_id
+				end
+		end
 	end
 
 	def find_or_create(customer_id)
diff --git a/test/test_registration.rb b/test/test_registration.rb
index 7d1a3962e2df347f58dce42213d3979e757291d5..cc78ce4f211db805cdd3ac413edbf59e31391d10 100644
--- a/test/test_registration.rb
+++ b/test/test_registration.rb
@@ -794,6 +794,11 @@ class RegistrationTest < Minitest::Test
 						EMPromise.resolve("parent_customer"),
 						["jmp_parent_codes", "pabc"]
 					)
+					Registration::Payment::InviteCode::REDIS.expect(
+						:get,
+						EMPromise.resolve(nil),
+						["jmp_customer_trust_level-parent_customer"]
+					)
 					CustomerPlan::DB.expect(
 						:query,
 						[{ "plan_name" => "test_usd" }],