NBG Authenticator is a free Android app developed by National Bank of Greece S.A. that provides enhanced payment authentication for online purchases. Its main goal is to ensure secure online shopping by approving or declining purchases made with your NBG cards. This app is in line with the latest EU security regulations and is a great way to protect your online purchases.

The app is easy to use. First, you need to sign in by activating your PIN or fingerprint. Once you have signed in, you can register your NBG cards. Every time you make a purchase from an e-shop with your NBG cards, you will automatically receive a push notification to login to the app. You can then approve or decline the purchase directly from the app. This feature ensures that all your online purchases are secure and approved by you.

Overall, NBG Authenticator is a must-have app for anyone who wants to make secure online purchases with their NBG cards. It is easy to use, and its enhanced payment authentication feature ensures that your online purchases are always secure and approved by you.