Call tenant's employer about late rent

[Shaw Dadsetan]

Hello all,

Is a landlord allowed to call the tenant's employer/ place of work due to the rent being late for 15 days and the tenant's does not respond to any form of contact? and they are no longer in the property but their girlfriend, who is not on the lease, still lives there? Two months ago, he gave his notice to leave on the 15th of April (just a few days away). If I'm not allowed to discuss the late rent with the employer, am I allowed to at least ask if he still works there? Or is that illegal?

Thank you,

Shaw