The process of masking a credit card can vary depending on which service you use. However, you will generally follow these steps.
Sign up for a masking service – That may mean opening an account, downloading an app or installing a browser extension.
Enter your credit card or load your account – If your service isn’t already associated with a specific account – such as an eligible Citi credit card – you may need to either add your credit card number or add funds to an account that will be used to generate virtual credit cards.
Request a virtual credit card – When you are ready, request a virtual or disposable credit card. This will generate the number you can use during checkout, and the process is often instantaneous. In many cases, these cards may be set up to limit the amount that can be charged, where they can be used and when they will expire.
Shop as normal – Once you have your masked credit card number, you can use it to shop as normal online.