ATM dispensed incorrect less amount

<p>I am a Capitec Account holder and withdrew R400 at an FNB ATM on the 12 January and the ATM only dispensed R300 and a piece of paper stamped with an FNB stamped. </p> <p> </p> <p>I contacted Capitec Bank and they told me they will investigate with FNB. After the investigation I was told that FNB said the ATM dispensed the correct amount. I don't understand if the ATM dispensed the correct amount then where do I get the piece of paper that is written "COUNTER USE ONLY" from with the FNB stamp dated the 4th January 2017.</p> <p> </p> <p>Does this mean we now need to always count our money after each withdrawal? How safe is this for us as customers? We are supposed to be trusting banks with our money but FNB clearly proved me otherwise. </p>