As long as your friend has a valid visa, theres no penalty.
Your friend should ask his mandoob(PR guy) for the ID.
IDs are issued when visa is renewed/stamped. At times the ID printing machine breaks down and as a result, ID cards wont be issued so they ask you to come back n check later.
Ask your friend to request for his ID at the same office where his visa was stamped. Ask him to carry a copy of his visa page.