Leo entered into a contract of sale with Norman where the former sold his car to the latter for P1.5 million. Norman made a down payment of P500,000 and, to ensure payment of the balance, executed a promissory note (PN) of P1M in favor of Leo. The PN states that in case of failure to make good the balance of P1M, Norman shall be liable to pay an additional 25% attorney's fees to Atty. Xian (Leo's lawyer) who prepared the contracts.

Norman failed to pay the P1M and a case was filed against him by Leo.

If you were the judge, will you honor or disregard the express written contract for fees between an attorney and his client (here between Leo and Atty. Xian as against Nor man)? Why or why not? Support your answer with an applicable article or provision.