Letter of Credit Forum

I have confusion between transferable l/c service charge and Buying House commssion .For Buying House  ,  buying house company must get permission from central bank &  inclusion Company And also their buying commission charge.But after getting L/C ,L/C has no clause in favor of buying agent charge. Many of cases L?C were transferable .they transfered the L/C second beneficiary  and getting more charge/commision which is greater than decclared buying commission since the agreement between First beneficiary(Buying House)  & second here buying charge is invalid.

1.Can a buying House get more charge than declared?

2.Can  a buying House take a advantage of transfer L/C i.e l/c value differ from the orginal L/C?

Chanchal,SJIBL,Dhaka