I was charged $1 by AWS, but I haven’t used any services yet.
When you add a new payment card to your AWS account, an authorization charge of $1 is sent to verify that the card is valid. The authorization charge is also used to verify that the card wasn't reported lost or stolen.
For AWS customers, the temporary authorization charge is 1.00 USD. AWS doesn’t proceed with the charge, and the charge usually disappears within three to five business days. The authorization charges for prepaid credit cards might vary.
For Amazon Web Services India Private Limited (AWS India) customers, the temporary authorization charge is 2.00 INR. While AWS does proceed with the charge, it's refunded to your account shortly after your account is activated.
Note: If your bank displays charges in a currency other than USD or INR, the small charge might show on your statement as a different amount. The charge amount might be different because of currency conversion.
If the charge was for a larger amount, see Why was I charged by Amazon Web Services when I don't have an AWS account?