even the language used sounds like the writer didn't learn English in the USA. They indicate that they are not in the USA by the term "your good country".
You probably (I cant know for sure) get the check, cash it, send them their share, then you learn the check is no good. Guess who is out the money.
Or the person sending the check is ok, but they do not receive the goods they are paying for and guess who they come after. You got their money and are the only person they report about the fraud.