A Guide to Using Your Debit Card for Online Purchases - iBlogs
Online shopping with a debit card works similarly to using a credit card, but the money is deducted almost immediately.
: Many banks require a second step, such as a One-Time Password (OTP) sent to your phone or a 3D Secure verification (e.g., "Verified by Visa").
: During checkout, provide the 16-digit card number, expiration date, and the 3-digit CVV/CVC security code from the back of the card.