Aadhaar has become a crucial document and a 'must have' given its increasing importance for financial transactions and the government's social security schemes.However, even if you have Aadhaar, did you know it could have become inactive? If you do not use your Aadhaar for three continuous years then it well may become inactive, as per the UIDAI helpline and officials at an Aadhaar enrolment centre.If your Aadhaar has not been used for the last three consecutive years i.e. you haven't linked it to any bank account or to your PAN or used it for any other transaction such as giving Aadhaar details to EPFO to claim pension and so on then it could have been deactivated.Here's how to check the status:On the UIDAI website homepage, under the Aadhaar services tab, there's an option saying 'Verify Aadhaar Number'.to go to UIDAI homepageClicking 'Verify Aadhaar Number' will redirect you to a new page.Enter your Aadhaar number, captcha and click verify. If the green checkmark appears, your Aadhaar is active.If your Aadhaar is inactive, you need to visit the nearest enrolment centre along with the supporting documents. Click here to find the nearest enrolment centreYou will be required to fill out the Aadhaar update form and your biometrics will be re-verified and updated. You need to pay a fee of Rs 25 at the enrolment centre for the update. Mentioning a valid mobile number would be mandatory during the process.Since process to activate the Aadhaar requires your biometrics to be re-verified and updated in the UIDAI database, you need to pay a personal visit to the enrolment centre and this can't be done online or by post. The officials at the Aadhaar enrolment centre will match your new biometrics with the biometrics previously recorded with that Aadhaar number and only if the two sets match then the updation will be done.The above information was checked by the correspondent from UIDAI helpline and re-verified with officials of a a local enrolment centre in sector 10 Noida, Uttar Pradesh.