\u00a0number is the check digit. Check digits are used for card validation, security purposes, and the detection of typos. On Visa cards, the check digit is the 16th digit, while it’s the 15th digit on American Express cards.<\/span><\/p>\nCard networks run the check digit and the preceding digits through the Luhn Algorithm, a simple checksum formula, to validate the card number and reduce fraud.<\/span><\/p>\n<\/span>What is the security code on a Visa card?\u00a0<\/span><\/strong><\/span><\/h2>\nThe security code on a Visa card is the three-digit number located on the back of the card, near the signature strip. This code, called a Card Verification Value (CVV), verifies that the card is genuine and has not been tampered with. The CVV code helps to protect businesses against card fraud by verifying that the card is in the possession of the person who is using it.<\/span><\/p>\n<\/span>What is Visa’s debit network?<\/span><\/strong><\/span><\/h2>\nVisa’s debit network operates under the brand Visa Debit, which is a major global payment system. Visa Debit allows cardholders to make purchases in person, online, by phone or mail, and to access cash at ATMs using funds directly from their bank accounts. When a transaction is made with a Visa Debit card, the amount is electronically deducted from the user’s bank account rather than accumulating as a credit card balance.<\/span><\/p>\nIn addition to Visa Debit for consumer transactions, Visa also offers the Visa Interlink network for point-of-sale transactions and the Plus network for ATM access around the world. These networks facilitate electronic funds transfers and ensure that merchants can accept payments while consumers have widespread access to their funds.<\/span><\/p>\nWhen you use a Visa-branded debit card at a merchant or an ATM, your transaction travels over one of these networks to authorize and process the payment. The robust infrastructure of these networks ensures security and efficiency in millions of transactions processed daily across the globe.<\/span><\/p>\n<\/span>Can I activate my Chase debit card online?<\/strong><\/span><\/h2>\nYes, you can activate your Chase debit card online. To do so, log in to your account on the Chase website or through the Chase mobile app and look for the activation prompt for your new debit card. In addition to online activation, you have other options as well. You can activate Chase debit cards by calling 1-800-290-3935 and following the instructions provided over the phone. Alternatively, you can complete a transaction at any Chase ATM using your PIN to activate the card.<\/p>\n
<\/span>Free card validator tool: Verify a card number<\/span><\/strong><\/span><\/h2>\nOur free card validator tool is designed to check whether a debit card number is valid. Simply enter the card number, and the tool will tell you whether the card is valid or not.<\/span><\/p>\n