On-line payment is without a doubt the most misunderstood element of an e-commerce Web site. In this article, I show you the big picture, then step through the details. First, the big picture. The goal here is to transfer money from the customer's credit card account to your merchant account.
A merchant account is a special account you set up with your bank for receiving credit card payments. You may already have a merchant account that you established when you started accepting credit cards over the phone or at your brick-and-mortar business. However, be aware that your current merchant account may not allow Internet transactions. If it does not, you will have to convert to one that does or open a second account.
So how does the money get from the customer's credit card account to your merchant account? Please refer to Figure 1 while I explain.
The Internet purchase process is generally broken up into two distinct phases: authorization and fulfillment. Steps 1, 2, and 3 in the figure represent the authorization phase (indicated with dotted lines). Authorization verifies that the customer has the necessary funds available at the time the sale is made. Steps 4 and 5 represent fulfillment (indicated with solid lines in the figure). Fulfillment says that you have shipped the order, so the funds are now yours.

Let's take it step-by-step:

1. The customer enters credit card information and submits the order.
2. The shopping cart software processes the order and submits it to the Internet payment processor (or payment gateway) such as CyberCash, Authorize.net, or others.
3. The payment processor requests authorization from the customer's financial institution through the banking network. The response to this request (accept or deny) is returned to the shopping cart. This step completes the authorization phase.
4. The merchant uses administration tools provided by either the shopping cart or the payment processor to capture payments for orders that have been shipped.
5. The payment processor settles captured payments, usually on a nightly basis. At this point, the funds transfer from the customer' financial institution to the merchant's financial institution. This step completes the fulfillment phase.

Depending upon how you fill orders, there may or may not be a time lapse between the two phases. If you regularly process orders on a daily basis, your payment processor may let you automatically mark your transactions for capture at the end of each day, which eliminates step 4.

The Devil Is In the Details

Although conceptually, the process isn't complex, the logistics related to implementing the process are the source of trouble. The first trouble spot can be between your customer and your shopping cart. For example, your customer may want to use American Express or Discover, but your merchant account may only accept Visa and MasterCard. (Your Web site should clearly state what cards you accept.)
The next hurdle is between your shopping cart software and your payment processor. Not all shopping carts support all payment processors. For example, your shopping cart may support Authorize.net, but not CyberCash.
Finally, you need to make sure that your payment processor can communicate with your financial institution's bank network. If it can't, then there is no way for the payment processor to settle payments into your merchant account.
The trick becomes selecting a merchant account provider that works with your Internet payment processor, that in turn works with your shopping cart.

Merchant Accounts

To process credit card payments over the Internet, you must have some form of merchant account that receives payments and pays service charges. Many times, your Internet merchant account can be tied directly to your business checking account.
Not all merchant accounts can be used to accept Internet payments because Internet transactions are considered more risky than traditional point-of-sale transactions. Financial institutions use different fee schedules to accommodate that risk. So, talk to your bank first and go from there.

Payment Processors

Your payment processor, also known as a payment gateway, makes it possible for your Web site to collect credit card information and get authorization for a transaction without human intervention. The payment processor takes the place of a card swipe in a traditional point-of-sale environment.
Your shopping cart sends information about the customer's order to the payment processor and the payment processor negotiates with the banking networks to get an authorization (or failure) code. Fees vary, so compare carefully.

Merchant Interface

Your payment processor should give you a browser-based merchant interface to let you capture, void, and refund charges.Once you log in, you can review your current transactions and your transaction history. Some services let you download your transaction history so you can import it into other computer programs.
You usually capture payments at the end of the business day when you know which orders you shipped. You use the merchant interface to mark the payments for shipped orders, and that night, the payment processor settles the payments, which transfers the funds from the customer's financial institution (called the issuing financial institution) to your financial institution (called the acquiring financial institution). Depending on your set up, you may need to process orders in both the shopping cart and payment processor's merchant interface.

Security, SSL, and Digital Certificates

Web forms are no more secure than e-mail unless you take precautions. That is where SSL (Secured Sockets Layer) comes in. To implement SSL on a domain, you must acquire a digital certificate from a qualified certificate authority, such as VeriSign or Thawte. Your Web host installs the certificate on the computer that hosts your site.
The certificate does more than just establish your identity. It also allows you to encrypt communications between the browser and the server. Encrypting the communications makes it nearly impossible (certainly impractical) to decipher the contents of a message.
You may not need a digital certificate for your Web site if your shopping cart host provides a common check-out facility. In that case, the host has the certificate and they let you "borrow" it to process secure transactions.
Although Internet commerce seems complex at first, once you have an understanding of the processes involved, it's much easier to implement them correctly.





Figure 1. How an online transaction is processed.

Ehm..so. i don't think so many people will understand that image because its not really clear and i cannot read a single words and why you keep make many post. Why not you just make 1 long post and post all your information. Thats will save your time and space.

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Ehm..crap post? OK..we will see who post the crap post in the end of this month. Hope you qualified to win this contest and hope you will win at the 1st place. I said congratulation to you first..

Ps: Mod and admin already know about your thread.

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