deposit. Terms of service for many mobile (cell phone camera) deposits also require the MICR section to be readable. Not all of the MICR characters have been printed at the time the cheque is written, as additional characters will be printed later to encode the amount; thus a sloppy signature could obscure characters that will later be printed there. Since MICR characters are no longer necessarily printed in magnetic ink and will be scanned by optical rather than magnetic means, the readers will be unable to distinguish pen ink from pre-printed magnetic ink; these changes allow cheques to be printed on ordinary home and office printers without requiring pre-printed cheque forms, allow ATM deposit capture, allow mobile deposits, and facilitate electronic copies of cheques. For additional protection, a cheque can be crossed, which restricts the use of the cheque so that the funds must be paid into a bank account. The format and wording varies from country to country, but generally two parallel lines may be placed either vertically across the cheque or in the top left hand corner. In addition the words 'or bearer' must not be used, or if pre-printed on the cheque must be crossed out on the payee line. If the cheque is crossed with the words 'Account Payee' or similar then the cheque can only be paid into the bank account of the person initially named as the payee, thus it cannot be endorsed to a different payee. Attached documents Cheques sometimes include additional documents. A page in a chequebook may consist of both the cheque itself and a stub or – when the cheque is written, only the cheque itself is detached, and the stub is retained in the chequebook as a record of the cheque. Alternatively, cheques may be recorded with carbon paper behind each cheque, in ledger sheets between cheques or at the back of a chequebook, or in a completely separate transaction register that comes with a chequebook. When a cheque is mailed, a separate letter or "remittance advice" may be attached to inform the recipient of the purpose of the cheque – formally, which account receivable to credit the funds to. This is frequently done formally using a provided slip when paying a bill, or informally via a letter when sending an ad hoc cheque. Usage Parties to regular cheques generally include a drawer, the depositor writing a cheque; a