Used to have a game on a portable device that wasn't networked. Had to have a code to authenticate software downloaded from your desktop machine.<p>Folks failed to put in the right code, routinely. Biggest trouble ticket frequency, Code doesn't work!<p>So we issued upper-case only code, capitalized whatever they put in. Removed all blanks. Tried multiple matches, swapping '1' and 'l' and so on until something worked.<p>Trouble ticket dropped to nearly zero.<p>The code didn't really matter to us. Just something the platform needed to work. So we were happy to be generous.