[joering2]

They did not allowed lower cases which helped alot. "L" was easily distinguished from "I" |_, so was "B": |3 from 8.

[dsfyu404ed]

This. Pick a good font and the problem goes away.

[cma]

And then you have to enforce the font in all written communications and emails that mention things by serial.

[rleigh]

You also need to allow for legibility in the face of damage, if that could lead to ambiguity.