There many online processing service online. Merchant Account is one of them it is a process in such a way that one can earn from his/her ecommerce site staying at your home. All the transactions through the ecommerce site are automatically performed through merchant account and it is possible for you to earn while you are in sleep. Merchant account is generally provided through the credit card companies like Mastercard, VISA, Paypal etc. But If you are thinking to have a merchant account owner you must be careful there are a lot of options waiting for you and there are some tips for selecting merchant account.