I would imagine that you are wondering if you can be sued for slander if you speak critically of a former employee. Generally speaking, it is legal to speak the truth. If you were planning to tell lies about your former employee, that could get you into trouble.
It depends on what she or he said. When a Manager or Supervisor calls your former employee for a reference, they are suppose to ask your former employee will you hire this person again, your former employee only suppose to say Yes or No.
A former employee is a non employee. You can discuss what you want.
A former employee is a person who used to work for the company but no longer do. This includes those that were let go or that quit on their own.
yes
How would you describe the quantity and quality of output generated by the former employee
Passively, yes. If a potential employer wants a letter of recommendation from a former employer, and the former employer knows the ex-employee is a hopeless loser or an outright crook, they will write a letter of "recommendation" that will say in effect: "So-and-so worked for us from this date until that date and was found to be 'satisfactory' ". That is the kiss of death. And the former employer has covered themselves, because they said - in print - the employee had been 'satisfactory'.
Sure. Besides, you wouldn't want their reference then, since it would be negative. Certainly. Most companies will only validate that an employee worked there from their start date to their end date. The usually won't even say why the individual left.
No. An employee, whether current or former, cannot use your medical record without your consent.
No. They can provide your dates of employment and your title. Most will not say whether you are rehireable or if you voluntarily quit. If you worked for the government at any level, these details may be available.
no
A current employee is still employed by that particular employer; a former employee is not.
yes