A bench headed by Chief Justice J S Khehar said mobile numbers are now being used for banking purposes also and "you should tell us as to what mechanism you are going to have to scrutinise the identity of mobile users".
Khehar said that it is important to remove fictitious subscribers for a crackdown on fraudulent activities.
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The bench was hearing a PIL filed by NGO Lok Niti Foundation, which has sought a direction to the Centre to put in place a proper mechanism to check the authenticity of information provided by mobile users.
The verification has become more importanat in view of the fact that mobile phones are now being used for banking purposes also.