How do I find out a merchant number

• When you get the approval email from the merchant account processor. They sent you merchant ID and also sent you login ID and password to the control panel. This is the best way to find out what your merchant account number. 
• In case that is not available, you can call the customer service team of the payment service provider and then be happy to assist you the same. 
• The third alternative would be to check your payment processing statement. Most of the times this number is clearly visible on the top of the payment processing statement. 
• The fourth option would be to log into your control panel. Once you login to your control panel also known as merchant account panel. You will be able to get vital information related to your merchant account. This should also include your merchant account number.