Even though business planning, bookkeeping & administration are important for business success, the most important aspect of any business is sales & marketing. Operations, administration, strategic planning & bookkeeping are all necessary but irrelevant without the generation of leads & new customers.
Where to Locate your Security Code. Debit card security codes are located on the back of the card. The last three numbers to the right of the card are known as your security code. Why the Security Code is Important. The security code offers the cardholder an extra layer of protection from fraud and unauthorized use.
1 American Express cards have a four-digit code printed on the front side of the card above the number. 2  Diners Club, Discover, JCB, MasterCard, and Visa credit and debit cards have a three-digit card security code. 3  The code is the final group of numbers printed on the back signature panel of the card.