Never send money to an individual you haven't yet met.
Use caution when donating to organizations that aren't well-documented, or if there's any reason whatsoever to doubt their legitimacy.
Don't participate in unusual financial exchanges involving bank account transfers or money orders. When in doubt, research and/or ask for referrals. Legitimate organizations will be happy to provide information.
Never open an unsolicited video resume. Occasionally we hear from someone who's received a 'Video Resume' email link that took them to a malware-bearing webpage. These resumes do not come from our site, have no relation to actual Idealist users, and should be treated as spam and deleted immediately.