Get a 1 pager statement from your bank - this is not the print of your account statement showing debits and credits over a period of time.
This statement on the bank letterhead will include the following,
1. Applicant's name and date of statement
2. Address, telephone, mail id of the bank (hopefully on the letterhead itself).
3. Account number(s)
4. Date(s) when each account was opened
5. Current balance of each account
6. Average balance in the past six months of each account
7. Signature of the concerned authority.
CIC doesn't require full disclosure of personal financials. If you can show all the balance in a single account, just mention that account alone in this statement and not all your accounts.
Banks can calculate average balance in a variety of ways, it doesn't matter how they calculate. What CIC is looking for is to identify if there is a large variation between present account balance and average balance of 6 months to identify if there have been any unreasonably large credit transactions into your account which might indicate borrowed funds. If there are any such transactions, the onus is on you to prove that those funds aren't borrowed.
Hope this clarifies. All the best! (Reference: Asivad Anac)