Once you reserve a PO Box at the Post Office location, link it to your USPS.com account. You can manage it online instead of the Post Office location. Link a PO Box to an USPS.com Account
Quick Answer. Cashier's checks themselves do not expire as personal checks do. However, the funds behind the check are subject to state escheat laws.
Six-Month Limit. Personal checks donât expire. But they do become what is known as âstale dated.â Simply put, a check becomes stale dated six months after it was written. After six months, banks have the option of refusing to deposit or cash any stale-dated checks. Why the sixth-month limit?