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.
Confidence votes 196. Under CPA Rule A4, Section 21, a cheque is considered stale-dated after six months, unless it has been certified. Although it may be returned through the clearing for that reason, there is no obligation to do so, and the payorâs financial institution may still accept it as a valid payment item.ow long is a hsbc bank cheque valid for? An HSBC bank Cheque is valid for a period of about six months but some banks require a check be cashed within ninety days of the issue date or else the funds go forfeited.