Here is an article on the correct way to write a Bill of Exchange
http://is.muni.cz/do/1499/el/estud/praf/ps06/bills/materialy/files/016text.html
and here is what happens if the Bill Of Exchange is dishonoured
http://www.accountingformanagement.com/dishonour_of_bill_of_exchange.htm
and here is everything you need to know about a Bill of Exchange
http://www.accountingformanagement.com/definition_and_explanation_of_bills_of_exchange.htm