Both a cashier's order and cheque are written documents that serve the purpose for transferring money. The main difference lies in the fact that a cashier's order is guaranteed not to bounce, since the money has already been retrieved from the payer's account when it is issued.
How long is cashier's order valid?
What is the validity period for a Cashier's Order? Cashier's Orders are good for payment within 6 months from the date of issuance.
Can cashiers checks be reversed?
How do you cancel a cashier's check? If you are still in possession of a cashier's check and you want to cancel it, bring it back to the bank where you originally got the check and you will usually have to fill out a deposit slip to have the funds put back into your account.