"When a person pays a fee in advance for the grant of a patent, renewal of a patent or for any other purpose, he is entitled to a refund of that fee, less fifteen dollars, if he decides not to proceed with the application for the patent, renewal or other matter to the stage where the fee would be required. [Payment of Fees] 8.???(1) Fees that are paid by cheque, bank draft or money order shall be f" . . . .