FWIW
https://alis.alberta.ca/ep/eps/tips/tips.html?EK=7386
...Liability
In Canada, employers who provide misleading references may be liable to
a fired employee, when a negative or a basic minimum reference makes it difficult for the employee to find another job
a potential employer who hires someone on the basis of a good reference, especially if the reference fails to mention any safety concerns raised by the employee’s conduct on the job