Any dissatisfied buyer who believes the builder or developer has defrauded them can register a complaint under Form ‘A’ of Section 31 of the Real Estate Regulation (and Development) Act against the builder or developer.  If a builder tries to sell or market an unregistered project, a buyer might submit a complaint against the developer or builder

2)For un registered project  can either sue the builder in consumer court or file a criminal complaint against him for the unregistered project. 

3) The Bombay High Court has directed the state government to take appropriate steps and prepare a policy to address MahaRERA’s complaints under RERA actions about unregistered projects by builders and developers in Maharashtra. 

4) in the judgment of Mohammed Zain Khan V/s. Maharashtra Real Estate Regulatory Authority in WP (L.) No. 908 of 2018 a statement by MahaRERA was made that MahaRERA shall take cognizance of complaints in respect of unregistered projects also."

Section 59 of RERA prescribes penalty of ten percent for a project not registered. Your project is not exempted registration under RERA. The said provisions also prescribes imprisonment up to three years, for failure to comply direction issued  by Authority under Section 3 (1). There is such judgment by Karnataka High Court  imposing penalty of 50 L for the offence  of not registering the project.

you can fix him on that judgement. 

RERA is applicable to all real estate projects, even if a completion certificate is issued to the project.

The mere filing of an application for occupation or completion does not exempt the project from RERA.

In the case of perpetually delayed projects  that are not registered under RERA, the customer may file a complaint with the authority or adjudicating officer, appointed under the legislation as per Section 31 of RERA. A homebuyer can also file a complaint against the real estate agent in the form or manner provided under the Act. The homebuyers can not only reach out to RERA authority in the State but other legal bodies as well. For instance, under the Consumer Protection Act, 1986, a homebuyer can register a complaint under Section 2(1) (c) for deficiency in services. The term deficiency in services refers to any fault, imperfection, shortcoming or inadequacy in the quality, nature and manner of performance, which is required to be maintained as per the law.

No you cant bring it under its purview you can try mofa or consumer law

Dear client,  If the property was has not received the completion certificate then in that case the rera can took the project in the study and proceed with.

There is a recent judgment of the Hon'ble Madras High Court on the issue for bringing such projects too under the ambit of the RERA. I shall revert soon.