We have took over a condo under a housing loan from the original owner whom was suffering from financial difficulties. We have agreed to pay him 1M with signed contract and continue to pay the succeeding monthly amortization with the bank for almost 11 years. It has not been a very good relationship with the previous owner and now he is demanding us to pay the remaining balance within the year, if not he will stop communicating with us. I would like to know what will happen if he stop communicating with us and not sign the papers with the bank when the loan has been paid off? Are we to file a case against him? Can he demand us to pay everything within a given time frame even if that was not agreed upon originally? Please advise. Thanks,