The ministry took up the matter with authorities concerned in Uttar Pradesh, Haryana, Uttarakhand, Punjab and Bihar.
The ministry said certain unauthorised individuals were found "distributing illegal forms in the name of cash incentive" under the scheme.
The scheme has no provision for cash incentives for individuals, said an official release.
"Keeping in view the public interest and gravity of the matter, the case has now been referred to the CBI for investigation," the release said.
"Repeated warnings have been publicised several times by the ministry in print and electronic media. The ministry has advised that no personal details should be shared in this regard and no one should subscribe to such fraudulent schemes. However, still some people are falling prey to such frauds and buying forms or disclosing personal details in the name of such non-existent benefits falsely offered in the name of the scheme," the release added.
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