A virtual card number stands in for your real card number at online stores, so a store’s data breach exposes a number you can lock or delete. It does nothing when a scammer gets you to share your card login or a one-time code. Never give either to anyone who contacts you.
A breach and a scam can both end in a charge you didn’t make, but they start in different places. A breach starts inside a store’s computer systems, and a scam starts with someone tricking you.
A virtual card number does its job at the store. If a store’s records leak, you lock or delete the one number it held, and your physical card keeps working. Thieves check stolen numbers with small test charges, and a number locked to one store is set to decline those charges anywhere else. Lock the number or cap its spending to stop a renewal you never meant to pay. Cancel with the company too, since a blocked charge doesn’t end the subscription, and the company can sometimes override the block.
Phishing, a text or email posing as your bank or a store, goes around all of that. Some messages ask you to confirm your real card number, which no stand-in protects. Others ask for your card login and the one-time code your bank sends when someone signs in. With both, a scammer can sign in as you and even make new virtual numbers to spend with. A stolen phone with no screen lock hands over the same access, since your texts, email, and saved passwords come with it.
Cover the scam side with three habits:
- Turn on two-factor authentication, a second check after your password, for your card account, so a stolen password alone can’t open it.
- Set an alert for every charge, whatever the amount, so a charge you didn’t make shows up the day it happens.
- Set your phone to lock itself, with a passcode of at least six digits.
Then treat anyone who contacts you asking for your login or a code as a scammer, however real they seem. Your bank never calls, texts, or emails to ask for a code it sent.
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