It generates a code for a batch file. Batch files are files with the extension .bat which you can create with Notepad from Windows. Everytime you open the file it performs certain arctions like copying and deleting files and folders and even shutting down or rebooting the computer.
Most small businesses therefore do not issue checks with the length of time the check is valid printed on the face of the check. If your company writes a check, someone legally could attempt to cash it 10 months from now or in 18 months. Although banks can refuse to process checks that are over six months after the date on the check, rarely do the processors look at the date on the check.
Discovering an unredeemed check might seem like found money until you consider its expiration date. While some U.S. checks state how long you have to cash them on the check itself, others typically expire in a set number of days after being written. Not only does this encourage responsibility on the part of the check's recipient, it protects the issuer from overdrafts due to lack of funds if a recipient fails to redeem the check before it expires.