ZESA cares about the account number not the account holders name so as long as someone is paying they will deduct their 25%, so your negotiations shouldnt be with ZESA but with the previous tenant . if you take this problem to ZESA they will tell you the same thing, had a similar problem last year, ended up going to the previous tenant and made a deal with him that we shall pay half of the debt he had accumulated then for the remaining half we would pay it off as we buy the electricity tokens but at the end of the month that tenant was to pay us back all the money that ZESA had deducted during our payments for that month. *Luckily he could afford that deal....