Yup - I have similar options - people who are only 'emergency people' aka they can only pick up if parent has told me it is an emergency or I am calling in an emeregency and need them to pick up and than others who are 'at anytime' ... I also have clients give me a 'family password' so that if need be in an emergency they can add someone NEW for a one time only over the phone - they have to give me the password to prove they are the parent - they are not to tell anyone ELSE in the family the password so we know for sure it is only the parent calling to make this change - they tell me who is picking up and their full name and that person when they show up has to show PHOTO ID that matches the name given by the parents in order for me to release them!