California treats pay as the sensitive element. Cal. Lab. Code §432.3 bars an employer from seeking an applicant's salary history, and San Francisco's Parity in Pay Ordinance prohibits disclosure of a current or former employee's salary to a prospective employer without written authorization. California also polices half truths: in Randi W. v. Muroc Joint Unified School District (1997) 14 Cal.4th 1066, the Supreme Court held that an employer who writes about a former employee cannot mislead by selective omission. Employees reach their file under §1198.5, so assume every letter is read back against it.
New York applies its own salary history restriction through N.Y. Labor Law §194-a. The state imposes no service letter duty, so a departing employee has no statutory right to a written reason for separation. Common law qualified privilege protects good faith answers to legitimate inquiries, and it evaporates the moment an employer volunteers what nobody asked for.
Texas gives employers the clearest protection in the country. Tex. Lab. Code §103.003 permits disclosure of job performance information on request, and §103.004 grants immunity unless the employee shows by clear and convincing evidence that the employer knew the information was false or acted with malice. A truthful written statement of the reason for separation is separately protected under §52.031.
Missouri catches out of state HR teams unprepared. The service letter is mandatory, the 45 day window is short, and courts treat an incomplete letter as no letter. Damages are usually nominal unless a prospective employer read it and acted on it, but punitive damages remain available where a valid request is ignored.
Minnesota pairs the duty with a shield. The employer must give the truthful reason for an involuntary termination on request, and subdivision 2 of §181.933 then bars any defamation claim over that statement. Employees reach their personnel record within seven working days under §181.961, so the letter and the file need to tell one story.