Query for Valid Cash Deposit

Hi TaxFull Team, This is Vishal. I have a query on the cash deposit in the banks. Since there are multiple messages are circulating recently due to demonetization step by our PM, which is great step. But there are some confusion and rumors as well regarding cash deposits. So my query is: From USA where i work, I have transferred amounts to my father for buying a plot since March 2016 in various transactions with legal and valid online medium. so total amount transferred of approx. 7 Lakhs 65 thousands rupees. My father had received approx. 4 lakhs from my relatives as a credit. He had given that amount to property builder. Builder denied to accept the amount through cheque and so he withdrawn the amount from bank and given it to builder. So total amount of 13 Lakhs 76 thousands including regaristration charges has been given to builder. Builder delayed the plot registration due to various reasons and asked to have registration in the November month. Now since Notes are banned. Builder is returning approx. 10 Lakhs in cash and asking to deposit in the bank and then again pay it through cheque/RTGS. So now he is saying the plot will be registered with the price of approx. 10 Lakhs only. So the amount of approx. 3.76 lakhs is now will not be mentioned anywhere in the registration. So what if we get all the amount i.e. 13.76 Lakhs in CASH back from him and then we deposit in the bank account of my father from where the amount was withdrawn. Is there any issue by doing this??? Note: We have all the transactions and track of this 13.76 Lakhs amount in our bank statements.