What is a CVV or security number and where is it on my card?
When you are providing details for your credit card for a remote transaction, you will sometimes be asked for your CVV. Sometime this will also be referred to as a security number.
The CVV is located on the back of your card, on the right-hand side of the panel where you sign it, and you can provide this verbally to complete a remote transaction.
https://www.beyondbank.com.au/need-help/what-is-a-cvv-and-where-is-it-on-my-card