Usernames and email addresses are generally fine.
Posts and comments within this subreddit should be useful, respectful and use appropriate language at all times.
If you use the link-only posting feature in this subreddit, it will be removed automatically by the AutoModerator.
If someone is encouraging you to contact them outside of this subreddit, proceed with caution.
They don't touch money, your cc number, your name, etc.
They'll want 2 of the following 3 things: Your cc number, that you used.