Why can't a cash cheque be crossed?

A cash cheque cannot be crossed because crossing indicates that the cheque must be deposited into a bank account rather than cashed directly. Crossing serves to enhance security and reduce the risk of theft or fraud by ensuring that the funds are transferred through banking channels. Since cash cheques are intended for immediate payment in cash, they do not require this added layer of security. Therefore, crossing would contradict the purpose of a cash cheque.