The point u/s 138 of NI Act "Tthe cheque so issued must have been issued in discharge, either in whole or in part, of a legally enforceable debt or liability;" need a small clarification. Suppose, Mr. A - a Broking House Executive - posing himself as an expart in Stock Market , takes Rs. 5,00,000.00 worth of Stock of Mr. B under his controle without ant written agreement. Mr. A forces of Mr. B to buy/sale as per Mr. A's instructions only to generate huge brokerage for his company and by this process looses whole stock portfolio of Mr. B. After being cought, Mr. A gives a written undertaking on a plain paper assuming his responsibility to pay Rs. 5,00,000.00 to Mr. B. Afterward Mr. A gives a cheque of Rs. 5,00,000.00 from his personal account to Mr. B which - when deposited by Mr. B - was dishonoured by the bank for 'Insufficient Fund'.
Now in this case, can Mr. B move to the court u/s 138 satisfying the point above? Is this a legally enforceable liability on Mr. A? Can a cheating case u/s 415 be done on Mr. A if he denies his liability? What other ways to take to brought Mr. A to book and get back the money?