A smile and friendly persistence.-when enforcing any policy you should always be friendly but politely persistent. it is best to avoid negative terms such as no, you must, stop, etc. your best tool is to smile, politely explain the policy. if someone attempts to argue with you simply maintain your friendly demeanor and repeat the policy until they comply. if it is possible present the issue a choice so that business partner feels like they are making decisions.example:a contractor does not what to leave their california id for an access badge. they are becoming agitated. instead of simply telling the person they must do this to come into the building say, im not telling you what to do. what i am saying is that in order for me to be able to give you an access badge we need to hold on to your id in exchange. its completely up to what you want to do but its the policy. what you would like to do?in this example it is effectively the same as you must but because we are giving the person a choice, it tends to deescalate the situation.