Owners don't be scammed! Be Aware and Alert!
Scam artists pose as potential renters everyday on many different "by owner" websites. Why? Because it works! 
Before we continue it is important to know that Cashier's Checks, Money Orders, Certified Checks, as well as Personal Checks can be forged. Always go to your bank first to verify any check if you are in doubt and wait for funds to clear before you return money or rent your property! These scammers are pretty sophisticated. Sometimes even the banks are fooled by these bogus documents, until they try to collect the funds. Asking for payments by Credit Card will deter many fraudulent rental leads. 
Don't accept any payments in excess of the amount you are asking. Scammers ask you to cash these checks and money orders and pay them the difference.