Salestax

Hi,

I've asked this query to experts but i could not get the answer from there. i therefore put this query before forum and expect that some one may guide me. given below is my query;

A businessman knowingly purchased certain fake bills from one person and issued cheques against those bills.

after some time those businessman gave notice to those person through his advocate stating that those fellow (who has issued the bills) has not paid the sales tax on the said bills and as a result those businessman received a notice from sales tax department. those businessman through his advocate called upon the said person to interfere in the said matter.

prior to this the sales tax officer has already called upon those person and pressurised him to execute a writing that he has not paid tax on particular bills.

what remedy is available in favour of  those person against the said businessman as well as the sales department?