That's for water and electricity deposit, RM810. Handling over the key in March! 

Deposit Refund
The deposit will be refunded if the customer terminates or transfers the account.

The customer must go to Pusat Khidmat Pelanggan as stated in the bill and bring along the original receipt of the deposit.

If the original receipt is lost or misplaced, the customer is required to fill in the Lost Deposit Receipt Declaration Form.
TNB will reimburse the deposit in cash (if amount is less than RM400) or by cheque (if amount is more than RM400) after deducting any outstanding amounts (if any).

Please note that Deposit for 3 phase supply (400v) is RM700 while 1 phase supply (230v) only RM500 for DST.

https://www.tnb.com.my/residential/my-tnb-account/##amount
Reduction in Deposit Amount
If the average of two (2) months bill is less than the amount of deposit paid, TNB will refund the excess deposit upon customer’s request. For example:

Deposit Paid                                        RM300.00
Average Monthly Bill                                RM100.00
Average of two (2) months electricity used RM200.00
Amount credited to account (RM300–RM200) RM100.00