They will check with the bank all the details like opening date, funds deposited source. CIC will just check whether you can access the account or not, in other words, account should be in your name.Then It is fine, because my POF was given by the bank on their official letter head and stamp. There were few things missing like account opening date and average 6 months statement.
Even If they confirm it from the bank, I am fine with it as it is original plus it is a saving account. So it will be fine I think, correct me If I am wrong
All the best