Kapila, if she is blacklisted, she will not be allowed to take up employment until the work ban is over. She is allowed to come on family visit visa though, up to 6 months. Within 2 weeks of arriving she has to do a medical for her visit visa. After a week you go to immigration and stamp her passport for the duration of her visit visa and pay QAR 200 per month of visa. You will have to wait until her 'ban' is over and then she can apply for a job.

And I am female, not male ;-)