The web based word game currently boasts almost 570,000 active users per day and is one of Facebook’s top ten applications, according to reports.
However, Hasbro believes it breaches copyright and wants the application stopped.
According to Fortune magazine the firm sent a notice to Facebook about two weeks ago.
Indian brothers Rajat Agarwalla and Jayant Agarwalla created the word game back in 2006. Since then it has registered 2.3 million active users. It has different play options such as live play, via email or on a turn-based version.