A part of consideration money (3 lakhs) for a house paid through bearer cheque, in advance to owner of house before execution of sale deed. After two months he refuse to sell the house and assured to refund money. In two years he refunded only 80 thousands. The details of date and refunded money is writen on a plain paper with signature of both parties. After that he denied the cheque and money. In this case, a photocopy of incashed bearer cheque certified by the bank and statement/entry of withdrawl of money by cheque (in the name of hose owner) in the passbook of cheque issuer and that plain paper may be treat as a sufficiant evidence in court to prove the transaction or not?