420 time period

The exact date you got knowledge of such cheating and reasons for keeping quiet for 12 years are material facts to be studied by a local advocate for properly guiding you for a remedy if any.

In response to your query,

The Indian Limitation Act does not stipulate a time restriction for criminal cases. In criminal instances, however, a delay in filing a complaint against the perpetrator has negative consequences. It is the court only which can decide the time limit, if required. Therefore with proper legal procedure you can file the case even after 12 years.

Regards,

Aryan Raj