How to write when speakers spells a word?

When the speakers  spells :

  1. Insert a space between each of the letters. Do not use comma, stops, dots or hyphens to separate the letters.
  2. Except when it is a special project, do not expand the letters, if the speakers  says  "Jei" transcribe "J". 
  3. Except the case of a special project. write each letter in caps: A B C D E F J, etc.

When there is the case of a special project a screen with instructions will appear with any particular guidelines to follow.