Personnel record obligations are state-specific, and file organization has practical consequences in litigation.

Access rights. Many states give employees the right to review their personnel file on request, within a stated period, and to obtain copies at reasonable cost. Some permit a written rebuttal to be added to disputed material. Some restrict what may be added after a review request.

Separate files required. Medical information, including leave certifications and accommodation records, must be kept separately with restricted access. Immigration verification forms should be kept separately so that an audit does not expose the personnel file. Investigation files should be maintained apart from personnel files.

Retention. Employment records generally for a period after the employment relationship ends, with longer periods for payroll, benefits and safety records. Where a charge or claim is pending, retention obligations extend until resolution.

Content discipline. Every document in the file will be read by an opposing lawyer. Notes should record conduct and dates, not characterizations of the person. Documents added retroactively are identifiable and damaging.

Electronic files. The same rules apply, and metadata showing creation and modification dates is discoverable. A performance memorandum created the week of termination and dated three months earlier is discovered routinely.