Hy,

If your acknowledgment number for the migration certificate is showing as invalid, here are a few steps you can take:

1. Double-Check the Number : Ensure you entered the acknowledgment number correctly, including any leading zeros.

2. Try Different Browsers : Sometimes, using a different web browser or clearing the cache can resolve such issues.

3. Contact Support : Reach out to the issuing authority or the relevant administrative office via phone or email to report the problem and seek assistance.

4. Visit in Person : If possible, visiting the office where you applied can help clarify the issue.