# Using Onelink to save your payment information

Onelink lets you securely save and reuse your payment information for a faster checkout at tens of thousands of online businesses.
**1. Account Registration**
If you do not have a Onelink account, you can either sign up on [our website](https://onelink.com) or create an account while you're making a purchase on a Onelink-supported site.
**2. Authentication**
Your payment details are linked to your email address and your mobile phone number.
To pay with Onelink on a different computer, or after you log out, just enter your email address during checkout and we will instantly send you a text message to verify your identity.
Message and data rates may apply. Frequency of messages depends on the user. For help, reply with HELP. To stop, reply with STOP.
**3. Returning users**
When you come back to any participating site using the same device, your card information will be auto-filled to allow you to check out with a single click.