You can update your costumer's Address, Gender, DoB, Father Name online in Securewey Portal. For other details updates such as Demographic details (Name, Address, DoB, Gender, Mobile Number, Email) as well as Biometrics (Finger Prints, Iris & Photograph) in Aadhaar customer's will have to visit Enrolment Center.
As per the updates from the UIDAI, over 5 documents are being considered valid for proof of identity in Aadhaar card. The UIDAI accepts 5 documents for date of birth and 9 documents for Proof of Address (PoA). Full list is here:
1. Birth Certificate
2. Passport
3. PAN Card
4. Mark Sheets
5. SSLC Book/Certificate
1. Passport
2. PAN Card
3. Ration Card
4. Voter ID
5. Driving License
1. Passport
2. Bank Statement
3. Passbook
4. Ration Card
5. Post Office Account Statement
6. Voter ID
7. Driving License
8. Electricity Bill
9. Water Bill