Alphanumeric Code Characters
Overview#
- When generating alphanumeric codes that a user may need to enter or reference, there are certain characters that should be avoided to prevent usability issues.
Design Guidelines#
Use when#
- A code or reference ID is being generated by the system.
Usable Characters#
- Letters
- Numbers
- Symbols
Unusable Letters#
- I O S
Letters to avoid unless additional characters are necessary#
- U V
Unusable Numbers#
- 0 1 2 5
Editorial#
- Display letters in ALL CAPS