Whether UIDAI has defined process to be followed for Family enrolments?

Yes. Head of the Family should invariably bring the original POI/POA for verification and only those family members can be Enroled based on the family entitlement document, whose names & other details are recorded on it. For family enrolments it is desirable that the family should come together for enrolment as far as possible. In case all the members cannot make it on the same day then the head of family should invariably accompany the family member whenever he/she comes for the enrolment.