This document discusses three key questions about usability: where payments are made, how much payments cost, and what value is provided by a payment card. It lists three bullet points asking "Where do I pay?", "How much do I pay?", and "What's the value in the card?".

1. Usability
Carlos J. Costa

2. ● Where do I pay?
● How much do I pay?

3. ● What's the value in the card?