Fraud may be committed as well by acts as by express words.1 Many of the cases illustrating this principle are also examples of active concealment.2 Any conduct intended to deceive may be fraud if the other necessary elements are present; as giving a check on a bank in which the drawer has no funds;3 employing a "puffer"at an auction;4 advancing bids at an auction when no real bids are made;5 bribing the agent of the adversary party through whom the contract is made;6 showing a prospective vendee a map on which the property which is offered for sale is improperly located;7 offering forged notes as collateral security,8 or buying goods on credit when the purchaser knows that he will be unable to pay for them.9