may not be able to be presented until that date has passed. In some countries writing a post dated cheque may simply be ignored or is illegal. Conversely, an antedated cheque has an issue date in the past. A cheque number was added and cheque books were issued so that cheque numbers were sequential. This allowed for some basic fraud detection by banks and made sure one cheque was not presented twice. In some countries, such as the US, cheques may contain a memo line where the purpose of the cheque can be indicated as a convenience without affecting the official parts of the cheque. In the United Kingdom a memo line is not available and such notes may be written on the reverse side of the cheque. In the US, at the top (when cheque oriented vertically) of the reverse side of the cheque, there are usually one or more blank lines labelled something like "Endorse here". Starting in the 1960s, machine-readable routing and account information was added to the bottom of cheques in MICR format, which allowed automated sorting and routing of cheques between banks and led to automated central clearing facilities. The information provided at the bottom of the cheque is country-specific and standards are set by each country's cheque clearing system. This means that the payee no longer has to go to the bank that issued the cheque, they can instead deposit it at their own bank or any other bank and the cheque would be routed back to the originating bank, and funds transferred to their own bank account. In the US, the bottom -inch (16 mm) of the cheque is reserved for MICR characters only. Intrusion into the MICR area can cause problems when the cheque runs through the clearinghouse, requiring someone to print an MICR cheque correction strip and glue it to the cheque. Many new ATMs do not use deposit envelopes and actually scan the cheque at the time it is deposited and will reject cheques due to handwriting incursion which interferes with reading the MICR. This can cause considerable inconvenience as the depositor may have to wait days for the bank to be open and may have difficulty getting to the bank even when they are open; this can delay the availability of the portion of a deposit which their bank makes available immediately as well as the balance of the