When purchasing online, merchants might ask for the billing information. Please make sure to enter the same details as you see in Pleo in order to prevent the payment from failing.
Here's how you can find the information.
From the Pleo webpage:
Click the My Cards menu
On the right side of the page, you will find the Billing details
From the Pleo app:
Click the card icon from the bottom menu
Scroll down where you can find the card holder name and the billing details