I was fired on a leave of absence for “not effectively communicating” with the work place while on a medical leave of absence. That was stated in the letter. Is that allowed?

We would need to know more about your situation to give you definitive advice (how long your leave was, how often you were communicating with them, etc.). It is very difficult for an employer to let someone go in that situation, so I would encourage you to give us a call at the number below. We'd be happy to assist as best we can.