Frequency is measured in hertz (Hz). A person who has hearing within the normal range can hear sounds that have frequencies between 20 and 20,000 Hz. The most important sounds we hear every day are in the 250 to 6,000 Hz range.
An issue date was added, and cheques may not be valid a certain amount of time after issue. In the US and Canada a cheque is typically valid for six months after the date of issue, after which it is a stale-dated cheque, but this depends on where the cheque is drawn; in Australia this is typically fifteen months.
The financial institution redeeming a check determines the expiration date of a personal check. The Uniform Commercial Code permits the accepting institution to decide whether it will redeem checks dated more than six months before the date you take the check to the institution.he issuing bank can refuse to pay for the check if the account holder placed a stop payment on the check, the account does not have the funds to pay for the check or the account is closed.