How to apply for Final Bill offline?

• Notify DEWA two days in advance through email / fax / personal visit to their Customer Service Centre. Please provide the following details:
  Customer Account Number
  Date of vacating premises
  Telephone / mobile number
  Valid ID of account holder
• Pay the Final Bill in cash and collect the receipt
  or request for adjustment of Final Bill against security deposit.
• To get refund of security deposit, submit request for refund with the following:
  Original security deposit receipt
  Final Bill and payment receipt
  Valid ID of account holder
  Authorization letter from account holder (if third party is collecting deposit)
  Valid ID of third party (if the above is applicable)
• To get refund of security deposit for companies, submit the following:
  Authorization letter from company, duly stamped and signed
  Last original payment receipt – for refund of credit balance in Final Bill