A cheque number is a 6-digit number uniquely assigned to each cheque leaf. It is written on the left-hand side at the bottom of the cheque. It is advisable to check i.e. count and check the number on each cheque leaf in a new cheque book when you receive it from the bank. This is to ensure that no cheque is missing from the cheque book. Ideally, you should record the transaction you have used each cheque leaf for in the transaction record slip attached at the start or end of a cheque book. In this record, you should mention the cheque number, date of cheque, amount and payee.