A Business can borrow money from bank with the help of bank overdraft. It implies that the business can withdraw money from its bank account more than it has deposited in the account.
In other words, banks give you a chance to withdraw more money than you have in your account. For example if a business has $5000 in its bank account, it can withdraw more than $5000. The excessive amount would be the bank overdraft (a current liability) of business and thereby business will have to pay off that liability.
In the case of overdraft Balance c/d is always on the debit or receipt(s) side of a cash book indicating that we have withdrawn more than we have deposited in our bank account
Dr. (Debit) Cr. (Credit)
$3000 is the overdraft (liability) of the business will be shown in balance sheet in the category of current liabilities