Before you enter the session room, Codementor will pre-authorize your card for the cost of a 15-minute session with that mentor (e.g. if the mentor is $15/15 min, then you'll see a $15 transaction), regardless of whether or not you start a paid session.
This is not a charge - we will automatically refund you the amount after you pay for your session or after 24 hours (whichever comes first). Please know that some banks may take a few business days to reverse this pre-authorization hold on your card.
If this is a concern for you, you can purchase pre-paid credits.