Main Settings / General Settings / Localization Settings / Address Format Settings / Use custom post codes
If this option is selected, then Classter will allow end users to enter a postal code that is not included in the postal codes list.
Example in student’s form
Setting -> Active (Figure1 , Figure 2)
The postal code I typed in, was added
Setting -> Inactive (Figure 3)
Postal Code field is only searchable, you can’t add new postal code.