I do not have any Date of Birth proof. How do I update the DoB in Aadhaar?

At the time of enrolment, an individual seeking enrolment has option to record DOB In Aadhaar as 'declared' or 'approximate' if no valid proof of birth is available. However to update DOB in Aadhaar,  the  Aadhaar number holder to submit a valid proof of birth document.