Debit card credit card black magnetic stripe contains crucial unique data of your debit card along with cvv
CVV will work only if the black bar works. The black stripe is a magnetic strip, which by touching it will not be known that there is any magnetic feature in it. Every important information related to your debit card is stored in this magnetic strip. Also Read: Loan From Aadhaar: You can take personal loan from your Aadhar card, know how… here is the complete process
Check your credit or debit card. At the back you will see a long black stripe. Have you ever wondered what is the use of this black stripe on the card of red, white or any other color. There is also a white stripe just below it but smaller than the black stripe. Three digits are written at the end of the white strip. It can also be in four digits on a bank card. Have you ever noticed these two bars and numbers? If not, then today we tell you what their work is and why they are made.
First of all, about the black bar. Usually this strip is black on all credit or debit cards. On touching it will feel like an ordinary bandage. But its work is extraordinary. Actually we are mostly aware of CVV ​​CVV. The reason is that it appears in the number and this number has to be entered in the online transaction. That’s why CVV plays the most in our mind. CVV is also known as CSC or Card Security Code, CVC or Card Verification Code, SIN or Card Identification Number or CVV2.
CVV and black bar interconnected
It is important to know here that CVV and black belt are related to each other and without each other there is no meaning. That is, CVV will work only when the black bar works. Now the question is, what does the black bar do that helps CVV. The black stripe is a magnetic strip, which by touching it will not be known that there is any magnetic feature in it. Every important information related to your debit card is stored in this magnetic strip.
What is its job
As soon as you swipe the card at an ATM or Point of Sale POS machine, that machine takes your information and initiates the transaction. That is, when you put the card in the machine, then this information will be fed in the server of that bank that at such a time, in this machine, the transaction of so many rupees has been done. If this black bar and information is not stored in it, then any information related to the transaction will not be known. This will create a big problem in front of the bank.
The white stripe below the black stripe is for the customer’s signature. This shows that the card belongs to the person in whose name the card is issued. Later, in case the signature has to be matched, then the authenticity of the card will be easily known. However, it is not necessary that if someone does not sign on the white strip, then the transaction will not take place. Three or four letters are written at the end of the white strip. It is called CVV. This CVV itself is incomplete if it does not have a black stripe attached to it. That is, there are two parts of CVV ​​in which one is a black stripe and the other is a three-digit number.
CVV acts like a guard
Both sides of the CVV work in the same way as a guard does the job of guarding a house. If someone from your guard wants to do a wrong transaction, then that transaction will be known from the information entered in the CVV and black bar. Suppose your card is lost and someone got it. If that person wants, he can do the transaction over Wi-Fi. As these days cards are coming with Wi-Fi enabled which does not require entering password or PIN. As soon as someone swipes from your card, all your data will go to the bank.
A message will come from the bank on your mobile phone. If you have not blocked the card before, then you will block it immediately. If you complain to the bank, then the bank will start investigation about that fake transaction. The bank will be able to collect information about fraudulent transactions done with your card because every information related to your debit card is stored in the black bar.
