[giantg2]

Well, typos or bad data from the client is a little more difficult to handle than what is basically a regex form validation.

[EVa5I7bHFq9mnYK]

From the client? All those typos come from bank clerks.

[giantg2]

It doesn't really matter who the typo comes from. It's going through a form in some computer system, any of which should have form validation.