diff --git a/src/main/java/com/pt/service/InvitedCodeService.java b/src/main/java/com/pt/service/InvitedCodeService.java
new file mode 100644
index 0000000..cd73452
--- /dev/null
+++ b/src/main/java/com/pt/service/InvitedCodeService.java
@@ -0,0 +1,16 @@
+package com.pt.service;
+
+import com.pt.repository.InvitedCoedRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class InvitedCodeService {
+
+    @Autowired
+    private InvitedCoedRepository invitedCodeRepository;
+
+    public boolean isCodeValid(String code) {
+        return invitedCodeRepository.findByCode(code) != null;
+    }
+}