permittedcharacters
nounUK /pəˈmɪtɪd ˈkærəktəz/
US /pərˈmɪtɪd ˈkærəktərz/
The letters, numbers, or symbols you are allowed to use.
The form only accepts permitted characters, so you cannot type a star.
OTHER MEANINGS
2. The set of letters and symbols a computer program will accept as input.
The app rejected my name because it contained a character that was not in the permitted characters list.
3. The letters and numbers allowed in a password or code.
Choose a password using only the permitted characters shown on the screen.
4. The symbols that may be used in a text field on a website.
The website told me which permitted characters I could use in my nickname.