It's possible for anyone who has an online account with their bank to check their account balance online from anywhere they have an Internet connection. All that is required is the user name and password for the online account.
Most banks allow customers to access accounts online as soon as they have opened the account. The online portal is generally accessible through the bank's webpage. Customers establish online banking by providing their account number as well as personal information used for identification purposes. They also create a unique user name and password that allows them to log into their account from anywhere.