1. The procedure followed by you for lending the huge sum of amount has flaws, 2. You should have collected promissory note and the said cheques from the person whom you have lend your money, 3. Do not call those cheques as security cheques since security cheques escape application of sec.138 of N.I. Act. Call those cheques as normal repayment cheques though the daughter may claim that she did not take any amount from you and those cheques were lost from her which you have filled and deposited, if those cheques bounce on deposition, 4. However, you can file a recovery suit since you can establish your lending the said amount through Bank transaction, 5. Also deposit the said cheques and file cheque bouncing case on their being dishonoured.