I have a field in a form where the entered data is usually presented all uppercase. It's a field for a person's code that is similar to a Social Security Number with the difference that it also contains letters. Here in Italy this code is always presented in all uppercase in official documents and in people's IDs etc.
I was thinking to present it in the same way by setting the field
I tested it by attempting to fill in the form, and I felt a bit frustrated because when entering the code and seeing the letters displayed in uppercase I thought my caps-lock was on.
Have you ever experienced a form that displayed your entered values in all uppercase? If so, what did you think of the experience?
Do you then think it's better to avoid using text-transform in input fields for usability?