Donc, vous faites la transaction à la place de l'utilisateur, et la seule différence, c'est que vos clients vous font confiance quand vous leur dites que la transaction a été faite.
So you're doing the transaction instead of the user, and the only difference is that your clients trust you when you tell them that the transaction was completed. However, if I call Bell Canada or some other company and I tell them that I paid my bill, they won't necessarily trust me.