No Customer Code or ID?

why there is no customer ID or code when making new customer? or is there any?

You can set automatic naming series for customer.

refer : Naming Series

Hi @Yudi_Firmansyah,

Adding in @Rahul-R’s answer, Please also check in Selling Setting.

There is a three-option like Customer Name, Naming Series, and Auto Name.
After saving the Selling Setting, Please reload and check it.

Thank You!