And, usually, once a MO is sent, there is no stopping its being cashed on the receiving end (unlike checks and credit cards).
In all cases now--I would treat MO's and Cashier's Checks just about like real checks. Which means that the bank can comeback several weeks later and pull the money from your account if the check is fraudulent—or even sue you for recovery. There have been more and more cases of cashier's checks being forged and they are not the gold standard they used to be.
And from what little I am aware; I don't think it is easy to verify a cashier's check yourself. The only guarantee is if somebody hands you the cash directly (such as cashing it at the bank or at the Post Office it was written on).
Check Fraud
[ QUOTE ]
When a Check Clears
People are caught by surprise because (a), they think that their bank can tell whether or not a check is fake, and that's really not possible. And (b), they don't understand that they're going to be liable for the check that they deposited in their account."
The problem is that banking laws require banks to give their customers access to funds within a prescribed number of days, depending on the type of check. But access to funds is different from a check "clearing," Grant explained.
"So when you ask if it's cleared, the yes answer you're going to get is based on your right to access the funds, not on whether or not the check is good."
...
Checking it out
Bauer decided to investigate the strange offers she kept getting. So she exchanged e-mails with one "buyer" and agreed to go along with his offer of overpayment. She even got a "call" from the man, routed through a "relay operator."
And then, "One day, I go to my post office box and there's a check in the mail and it's from Africa. It has the little township on it where it had been mailed and stamped by a post office, and sent to me in the United States."
"I knew it was fraudulent — but I was still excited that possibly it wasn't."
She took the check to her local bank and asked the teller to check its authenticity. It was drawn on a bank in Green Bay, Wisconsin, she was told; a quick call to the bank's 800 number found the account number on it was valid and there were funds available.
But the teller faxed a copy of the check to the bank just to be sure. "Four hours later, they called her back and said the cashier's check was out of sequence," Bauer said. It was indeed a fake.
...
Money order fraud
The Postal Service has a task force currently collecting evidence in these cases to put together future prosecutions. The agency got involved because postal money orders have been used in the scams.
Blanchard noted post offices have equipment that can immediately identify whether a money order is valid; that's why scammers often urge victims to deposit them in their bank accounts instead. And he said the Postal Service also is redesigning its money orders to try to prevent future counterfeiting…
[/ QUOTE ]
Be really careful out there—I would give a check a minimum of 6+ weeks to "clear" before I would count on the money being permanently mine.
Basically, these folks are robbing banks, and they are leaving you holding the bag since the banks can't (or really don't care) to catch the robbers themselves when they have you, the customer, available to cover their losses based on bad and unsecured processes.
-Bill