That's not quite how it works. In practice, in the US, liability comes not so much from giving a positive or a negative review, but from giving an incomplete one. This is most apparent as a result of giving a positive review and leaving out the bad bits. In this case, you might be liable for the negative consequences of hiring someone based on your positive review.

For an extreme example, see Randi W. v. Muroc Joint Unified School Dist [1]. In that case, the plaintiff sued several school districts for fraudulently or negligently providing positive recommendations for a teacher who ultimately sexually assaulted her. The California state Supreme Court held that the school districts were liable because there was a substantial, foreseeable risk of physical injury to a third-party resulting from the misrepresentations.

For this reason, it is common practice for businesses to decline to provide a review and instead simply confirm a prior employment relationship and the dates of the employment.

[1] https://law.justia.com/cases/california/supreme-court/4th/14...

That’s a great point, but at least as far as negative references go, you have libel/slander law with robust free speech protections. It’s nothing like Europe.

Personal references are protected, to the extent that liable and slander laws would apply.

Any HR person / lawyer will tell you providing a negative review of an employee, let alone with amount of detail, opens you up to liabilities that aren't worth it.

As an employer, I've been told that, if called, I should only provide the date a person started with the company, the date a person left, their starting and ending salaries (murky now given salary history laws) and whether they'd be eligible to be re-hired.

I ask any employee we fire for cause not to list us as a reference.

> whether they'd be eligible to be re-hired

"Bob isn't eligible for rehire. Wait, I think the line cut out a bit there, I said Bob isn't eligible for rehire. Just wanted to make sure you got that: Bob is not eligible for rehire, no way, no how, nosirree."

Keep in mind: the judges that interpret the law are humans, not computers.

I try not to even have a "tone" when I saw that. Completely neutral. No implications.

Will they give you a magnitude attached to those liabilities? Anybody can falsely sue for defamation, so you need an average cost value beyond the mere possibility of lawsuit to get a true representation of the problem.

The cost may be minimal, but the value of giving a bad reference is zero.

Would be more useful if you pointed out which part of the Bill of Rights provides this protection.

might help to stick to the countries laws you should be understanding

Impossible because it doesn’t

The 1st amendment.

which one protects giving negative references