Have you applied for Aadhaar but have not received it yet? Or have you misplaced your Aadhaar card? Now you can actually request the UIDAI to send the information to your registered mobile number. UIDAI has provided a tool that enables Aadhaar holders/applicants to retrieve the UID (Unique Identity Number). An Aadhaar applicant who has submitted his or her Aadhaar application or an Aadhaar cardholder can use the UIDAI portal to retrieve the UID on their registered mobile number. The only thing you should have is the registered mobile number which is active or email id that provided while the time of enrolment of Aadhaar card.