Since your current organization's joining date (DOJ) is before your previous employer's date of exit (DOE), it results in an overlap of 8 days.
Here are some potential solutions:
1. Request a Justification Letter from Current Employer
Since they have marked the incorrect DOJ, ask them for a formal letter justifying why they cannot change it.
This letter might help if you need to clarify the discrepancy in the future (e.g., for background verification).
2. Request an Explanation Letter from Previous Employer
If they also refuse to modify the DOE, ask for a letter confirming that the record is correct from their side.
3. Check Payroll and PF (Provident Fund) Contributions
If your previous employer has credited salary or deposited PF for October 2021, that strengthens your case.
Similarly, if your current employer has done the same from September 30th, it creates a compliance issue.
4. Speak to HR or Compliance Team
Explain the mistake to your current HR and ask if they can at least provide an internal confirmation that it was a clerical error.
Some companies might agree to issue an updated appointment letter or an internal memo to clarify the issue.
5. Prepare a Personal Declaration
If neither employer is willing to change the dates, draft a self-declaration letter stating the mistake and keep it for future reference.
6. Future Employer Consideration
If this is causing issues in background verification for a new job, proactively explain the situation to your prospective employer.
Provide supporting documents (e.g., offer letters, emails, salary slips) to clarify the misunderstanding.