When prompted for credit card information you can skip entering your card number but you will need to enter an address. (rachelheldevans.com)
If you end up needing to make online transactions or purchases while on your travels, only enter credit card information on sites including an «s» (for «secure»). (ordinarytraveler.com)
Around 72 % of consumers in general claim they feel uncomfortable when entering credit card information directly into an app. (littletechgirl.com)