CHEQUE given with out knowledge cheque holder

Hai Sir, Good Morning My name is Ganapathi, here we have a problem, my brother went to met a person Which he given job opportunity at railway job as TTE, he asked to my brother 4 lakh rupees for initial payment for further procedures, the total deal is 15 laksh rupees,my brother refused to giving money, he replied to that person iam not able to pay any money after job appointment, he will pay total amount on that time, the person agreed to that deal before he asked 2 blank cheques of my father, who is employeed, with out my father knowledge he take cheques from my home and given to that person, without sign, along with pan card and identitity card, after my brother went to calcutta. he stayed lodge for 10 days. for getting appointment, there is no appointment given, these come to know that these all are fake, i stopped cheques which is my brother given, that person sended lawyer notices to my father 136 niact, we replied through lawyer as fake employement. these thing happend on jan 2018, [deleted] we got summons from court. 136 ni act, we approach tha lawyer. in this case that person did not know to my father and my family , he was comletely stranger, my brother approached through his frined. is any serious, my family all suffered regarding this issue, please kindly give valuable suggestions.