[noirscape]

There's other "general" rules when it comes to random human-readable tokens such as not using Os and Is if your strings include numbers - people can and will confuse them with 0s and 1s if they have to type them over.

Most gift card tokens for example don't allow the use of those two (or quietly correct it) to avoid making that mistake.

[davchana]

California State Driving License and or ID Numbers are One Alphabet & then 7 digits. But always, if the character at second place is Zero, everybody reads it as Alphabet O.