State Operations Manual (Pub. 100-07), Ch. 5 § 5500.2
Acknowledgment
5500.2 - Acknowledgment
(Rev. 234; Issued: 09-12-25; Effective: 09-12-25; Implementation: 09-12-25)
If the complainant is known, the SA promptly issues written acknowledgment, e.g., email
or letter, that the complaint is being investigated. The SA should not delay
acknowledgment pending an investigation unless the investigation takes place within
three working days. The SA must take appropriate precautions to protect the
complainant’s anonymity and privacy. The SA maintains a copy or record of the
notification with the complaint documentation.