The phrase "fraudulent schemes" refers to dishonest or deceitful plans or actions that are intended to trick or scam people in order to benefit the person or group carrying out the scheme. Full definition
The lack of quality assessment standards, reliability and transparency of the new projects causes a lot of fraudulent schemes. (ico4you.com)
With the increasing amount of ICOs it was only a matter of time until rogue players decided to take advantage of hungry investors with fraudulent schemes. (links2exchange.net)
While foreclosure scams vary, they may be used in combination with other fraudulent schemes. (fbi.gov)