How to Sell My Stock Certificate Online

Open an account with a discount online broker if you don't already have one. You can use a full-service broker or the company's transfer agent if they offer online services. However, you will probably pay higher brokerage commissions or transaction fees than discount brokers charge.
Fill out the transfer of ownership form on the back of each stock certificate. Call the customer service number for your broker to make sure you enter their name and other information as required. If you don't already have the broker's mailing address, this is a good time to ask for that as well.
Send the stock certificates to the broker by certified mail with the U.S. Postal Service. Because stock certificates may be of considerable value, they should be insured when you mail them.
Wait a few days to allow time for delivery and processing of your stock certificates. You'll see them credited to your account online. All you have to do then is place a sell order with the broker.
Keep complete records of the transaction. At tax time you'll need them to report any capital gains or losses.

How to Become an Independent Stock Broker

Go to the National Association of Independent Securities Dealers and register to take a Series 7 Exam. The exam takes about six hours to complete with 260 questions, which you will have to pass with a score of 70 percent or higher.
Fill out and file a FOCUS form with the Securities & Exchange Commission, which will register your independent status. You can send it in by mail or electronically.
Set up an account at a brokerage like TD Waterhouse or Schwab to act as a custodian for any funds that you hold their on behalf of your clients. Although most brokerages that employ traditional brokers and also charge them fees based on the assets, they manage the independent broker is free of those onerous fees. At this stage, you can solicit clients and begin investing their money directly while keeping the lion's shares of the commissions and fees for yourself.