Here are a few professional ways to say it:

  • Following up on the OSHA complaint letter received on 6/24/2026 — has the response letter been drafted yet?
  • I’m following up on the OSHA complaint letter received on 6/24/2026. Has the response letter been drafted?
  • Just checking in regarding the OSHA complaint letter received on 6/24/2026. Is the response letter ready?

If you want it a little more formal, you could use:

I am following up regarding the OSHA complaint letter received on 6/24/2026. Could you please let me know whether the response letter has been drafted?

OSHA complaint responses are often handled promptly, and in phone/fax cases employers may be asked to respond in writing within five days, so a concise follow-up like this is reasonable.

Suggested subject line:
Follow-Up: OSHA Complaint Letter Received 6/24/2026