If you are not ready to purchase the item you joined the waitlist for, that's okay! You can ignore the notification email and no penalty will occur.
If you want to purchase the item, but just not right now, you will need to join the waitlist again. By not purchasing the item when you are notified, you will lose your spot on the waitlist and will need to re-sign up in order to be contacted again. We will not reach out a second time regarding any waitlist availabilities.
If you have decided you do not want to purchase the item at all, you don't need to do anything! Your one notification is all you will receive and no further notifications will be sent to you.