It's my understanding that a cashier's check can not become stale dated. We are having some discussion if we put the verbiage on the check that "after 6 mos this check is no longer valid," that this would be enforceable on a cashier's check. Does anyone have some guidance?

Take a look at this:

http://www.bankersonline.com/compliance/guru2011/gurus_comp020711d.html

and

http://www.bankersonline.com/operations/gurus_op061603d.html

Thank you! This information has been very helpful.