What are the common warning signs of a check scam and how can I protect myself from falling victim to one?

Common warning signs of a check scam include receiving a check for more than the agreed amount, being asked to send back a portion of the money, or being pressured to cash the check quickly. To protect yourself, verify the legitimacy of the check issuer, wait for the check to clear before sending any money, and be cautious of unsolicited offers that seem too good to be true.