fbzp all company codes

hi,

in fbzp, all company codes tab, there are 2 section 1 for vendor and another for customer.

may i know what is special gl transaction to be paid and another is exception list?

i notice we have F which is down payment request maintained in special gl transaction to be paid and exception list as well.

i know that down payment request is a noted item, so why it is maintained as to be paid?

also which exception list is this referring to?

please advise.

thanks